Apply changes from https://github.com/mono/mono/pull/17080 to API snapshot

9 files changed, 627 insertions, 6 deletions

diff --git a/profiles/monodroid/Facades/netstandard.cs b/profiles/monodroid/Facades/netstandard.cs
index faec721..9072ff6 100644
--- a/profiles/monodroid/Facades/netstandard.cs
+++ b/profiles/monodroid/Facades/netstandard.cs
@@ -79,6 +79,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Base64FormattingOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.BitConverter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffer))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ArrayBufferWriter<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ArrayPool<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.Binary.BinaryPrimitives))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.BuffersExtensions))]
@@ -92,6 +93,8 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySequence<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySequenceSegment<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySpanAction<,>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SequenceReader<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SequenceReaderExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SpanAction<,>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.StandardFormat))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.Text.Base64))]
@@ -515,6 +518,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowChangeEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowChangeEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowComparer))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowComparer<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowState))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowVersion))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowView))]
@@ -525,6 +531,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableClearEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableClearEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableNewRowEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableNewRowEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableReader))]
@@ -537,6 +544,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DbType))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DeletedRowInaccessibleException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DuplicateNameException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollection<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollectionExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EvaluateException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.FillErrorEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.FillErrorEventHandler))]
@@ -569,6 +579,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.MissingPrimaryKeyException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.MissingSchemaAction))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.NoNullAllowedException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.OrderedEnumerableRowCollection<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.ParameterDirection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.PropertyCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.ReadOnlyException))]
@@ -609,6 +620,8 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.StatementType))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.StrongTypingException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.SyntaxErrorException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.TypedTableBase<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.TypedTableBaseExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UniqueConstraint))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UpdateRowSource))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UpdateStatus))]
@@ -623,7 +636,16 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DBNull))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Delegate))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.BooleanSwitch))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.AllowNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DisallowNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DoesNotReturnAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DoesNotReturnIfAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverageAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.MaybeNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.MaybeNullWhenAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullIfNotNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullWhenAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.SuppressMessageAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.ConditionalAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Contracts.Contract))]
diff --git a/profiles/monodroid/System.Data.DataSetExtensions.cs b/profiles/monodroid/System.Data.DataSetExtensions.cs
new file mode 100644
index 0000000..0971f7d
--- /dev/null
+++ b/profiles/monodroid/System.Data.DataSetExtensions.cs
@@ -0,0 +1,107 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+[assembly:System.Reflection.AssemblyVersionAttribute("2.0.5.0")]
+[assembly:System.CLSCompliantAttribute(true)]
+[assembly:System.Diagnostics.DebuggableAttribute(System.Diagnostics.DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
+[assembly:System.Reflection.AssemblyCompanyAttribute("Mono development team")]
+[assembly:System.Reflection.AssemblyCopyrightAttribute("(c) Various Mono authors")]
+[assembly:System.Reflection.AssemblyDefaultAliasAttribute("System.Data.DataSetExtensions.dll")]
+[assembly:System.Reflection.AssemblyDescriptionAttribute("System.Data.DataSetExtensions.dll")]
+[assembly:System.Reflection.AssemblyFileVersionAttribute("4.0.50524.0")]
+[assembly:System.Reflection.AssemblyInformationalVersionAttribute("4.0.50524.0")]
+[assembly:System.Reflection.AssemblyProductAttribute("Mono Common Language Infrastructure")]
+[assembly:System.Reflection.AssemblyTitleAttribute("System.Data.DataSetExtensions.dll")]
+[assembly:System.Resources.NeutralResourcesLanguageAttribute("en-US")]
+[assembly:System.Resources.SatelliteContractVersionAttribute("2.0.5.0")]
+[assembly:System.Runtime.CompilerServices.CompilationRelaxationsAttribute(System.Runtime.CompilerServices.CompilationRelaxations.NoStringInterning)]
+[assembly:System.Runtime.CompilerServices.RuntimeCompatibilityAttribute(WrapNonExceptionThrows=true)]
+[assembly:System.Runtime.InteropServices.ComCompatibleVersionAttribute(1, 0, 3300, 0)]
+[assembly:System.Runtime.InteropServices.ComVisibleAttribute(false)]
+[assembly:System.Security.AllowPartiallyTrustedCallersAttribute]
+[assembly:System.Security.SecurityCriticalAttribute]
+namespace System.Data
+{
+    public static partial class DataRowComparer
+    {
+        public static System.Data.DataRowComparer<System.Data.DataRow> Default { get { throw null; } }
+    }
+    public sealed partial class DataRowComparer<TRow> : System.Collections.Generic.IEqualityComparer<TRow> where TRow : System.Data.DataRow
+    {
+        internal DataRowComparer() { }
+        public static System.Data.DataRowComparer<TRow> Default { get { throw null; } }
+        public bool Equals(TRow leftRow, TRow rightRow) { throw null; }
+        public int GetHashCode(TRow row) { throw null; }
+    }
+    public static partial class DataRowExtensions
+    {
+        public static T Field<T>(this System.Data.DataRow row, System.Data.DataColumn column) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, System.Data.DataColumn column, System.Data.DataRowVersion version) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, int columnIndex) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, int columnIndex, System.Data.DataRowVersion version) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, string columnName) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, string columnName, System.Data.DataRowVersion version) { throw null; }
+        public static void SetField<T>(this System.Data.DataRow row, System.Data.DataColumn column, T value) { }
+        public static void SetField<T>(this System.Data.DataRow row, int columnIndex, T value) { }
+        public static void SetField<T>(this System.Data.DataRow row, string columnName, T value) { }
+    }
+    public static partial class DataTableExtensions
+    {
+        public static System.Data.DataView AsDataView(this System.Data.DataTable table) { throw null; }
+        public static System.Data.DataView AsDataView<T>(this System.Data.EnumerableRowCollection<T> source) where T : System.Data.DataRow { throw null; }
+        public static System.Data.EnumerableRowCollection<System.Data.DataRow> AsEnumerable(this System.Data.DataTable source) { throw null; }
+        public static System.Data.DataTable CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source) where T : System.Data.DataRow { throw null; }
+        public static void CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source, System.Data.DataTable table, System.Data.LoadOption options) where T : System.Data.DataRow { }
+        public static void CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source, System.Data.DataTable table, System.Data.LoadOption options, System.Data.FillErrorEventHandler errorHandler) where T : System.Data.DataRow { }
+    }
+    public abstract partial class EnumerableRowCollection : System.Collections.IEnumerable
+    {
+        internal EnumerableRowCollection() { }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
+    public static partial class EnumerableRowCollectionExtensions
+    {
+        public static System.Data.EnumerableRowCollection<TResult> Cast<TResult>(this System.Data.EnumerableRowCollection source) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.EnumerableRowCollection<S> Select<TRow, S>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, S> selector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenByDescending<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenByDescending<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenBy<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenBy<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.EnumerableRowCollection<TRow> Where<TRow>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, bool> predicate) { throw null; }
+    }
+    public partial class EnumerableRowCollection<TRow> : System.Data.EnumerableRowCollection, System.Collections.Generic.IEnumerable<TRow>, System.Collections.IEnumerable
+    {
+        internal EnumerableRowCollection() { }
+        public System.Collections.Generic.IEnumerator<TRow> GetEnumerator() { throw null; }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
+    public sealed partial class OrderedEnumerableRowCollection<TRow> : System.Data.EnumerableRowCollection<TRow>
+    {
+        internal OrderedEnumerableRowCollection() { }
+    }
+    public static partial class TypedTableBaseExtensions
+    {
+        public static System.Data.EnumerableRowCollection<TRow> AsEnumerable<TRow>(this System.Data.TypedTableBase<TRow> source) where TRow : System.Data.DataRow { throw null; }
+        public static TRow ElementAtOrDefault<TRow>(this System.Data.TypedTableBase<TRow> source, int index) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.EnumerableRowCollection<S> Select<TRow, S>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, S> selector) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.EnumerableRowCollection<TRow> Where<TRow>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, bool> predicate) where TRow : System.Data.DataRow { throw null; }
+    }
+    [System.SerializableAttribute]
+    public abstract partial class TypedTableBase<T> : System.Data.DataTable, System.Collections.Generic.IEnumerable<T>, System.Collections.IEnumerable where T : System.Data.DataRow
+    {
+        protected TypedTableBase() { }
+        protected TypedTableBase(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
+        public System.Data.EnumerableRowCollection<TResult> Cast<TResult>() { throw null; }
+        public System.Collections.Generic.IEnumerator<T> GetEnumerator() { throw null; }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
+}
diff --git a/profiles/monodroid/mscorlib.cs b/profiles/monodroid/mscorlib.cs
index 60e8fab..035eb5b 100644
--- a/profiles/monodroid/mscorlib.cs
+++ b/profiles/monodroid/mscorlib.cs
@@ -5807,6 +5807,20 @@ namespace System
 }
 namespace System.Buffers
 {
+    public sealed partial class ArrayBufferWriter<T> : System.Buffers.IBufferWriter<T>
+    {
+        public ArrayBufferWriter() { }
+        public ArrayBufferWriter(int initialCapacity) { }
+        public int Capacity { get { throw null; } }
+        public int FreeCapacity { get { throw null; } }
+        public int WrittenCount { get { throw null; } }
+        public System.ReadOnlyMemory<T> WrittenMemory { get { throw null; } }
+        public System.ReadOnlySpan<T> WrittenSpan { get { throw null; } }
+        public void Advance(int count) { }
+        public void Clear() { }
+        public System.Memory<T> GetMemory(int sizeHint = 0) { throw null; }
+        public System.Span<T> GetSpan(int sizeHint = 0) { throw null; }
+    }
     public abstract partial class ArrayPool<T>
     {
         protected ArrayPool() { }
@@ -5891,17 +5905,19 @@ namespace System.Buffers
     public readonly partial struct ReadOnlySequence<T>
     {
         private readonly object _dummy;
+        private readonly int _dummyPrimitive;
         public static readonly System.Buffers.ReadOnlySequence<T> Empty;
         public ReadOnlySequence(System.Buffers.ReadOnlySequenceSegment<T> startSegment, int startIndex, System.Buffers.ReadOnlySequenceSegment<T> endSegment, int endIndex) { throw null; }
         public ReadOnlySequence(System.ReadOnlyMemory<T> memory) { throw null; }
         public ReadOnlySequence(T[] array) { throw null; }
         public ReadOnlySequence(T[] array, int start, int length) { throw null; }
-        public System.SequencePosition End { get { throw null; } }
+        public System.SequencePosition End { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public System.ReadOnlyMemory<T> First { get { throw null; } }
+        public System.ReadOnlySpan<T> FirstSpan { get { throw null; } }
         public bool IsEmpty { get { throw null; } }
         public bool IsSingleSegment { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public long Length { get { throw null; } }
-        public System.SequencePosition Start { get { throw null; } }
+        public System.SequencePosition Start { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public System.Buffers.ReadOnlySequence<T>.Enumerator GetEnumerator() { throw null; }
         public System.SequencePosition GetPosition(long offset) { throw null; }
         public System.SequencePosition GetPosition(long offset, System.SequencePosition origin) { throw null; }
@@ -5926,6 +5942,52 @@ namespace System.Buffers
         }
     }
     public delegate void ReadOnlySpanAction<T, in TArg>(System.ReadOnlySpan<T> span, TArg arg);
+    public static partial class SequenceReaderExtensions
+    {
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out short value) { throw null; }
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out int value) { throw null; }
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out long value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out short value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out int value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out long value) { throw null; }
+    }
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public ref partial struct SequenceReader<T> where T : struct, System.IEquatable<T>
+    {
+        private object _dummy;
+        private int _dummyPrimitive;
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public SequenceReader(System.Buffers.ReadOnlySequence<T> sequence) { throw null; }
+        public long Consumed { get { throw null; } }
+        public System.ReadOnlySpan<T> CurrentSpan { get { throw null; } }
+        public int CurrentSpanIndex { get { throw null; } }
+        public bool End { get { throw null; } }
+        public long Length { get { throw null; } }
+        public System.SequencePosition Position { get { throw null; } }
+        public long Remaining { get { throw null; } }
+        public System.Buffers.ReadOnlySequence<T> Sequence { get { throw null; } }
+        public System.ReadOnlySpan<T> UnreadSpan { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public void Advance(long count) { }
+        public long AdvancePast(T value) { throw null; }
+        public long AdvancePastAny(System.ReadOnlySpan<T> values) { throw null; }
+        public long AdvancePastAny(T value0, T value1) { throw null; }
+        public long AdvancePastAny(T value0, T value1, T value2) { throw null; }
+        public long AdvancePastAny(T value0, T value1, T value2, T value3) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool IsNext(System.ReadOnlySpan<T> next, bool advancePast = false) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool IsNext(T next, bool advancePast = false) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public void Rewind(long count) { }
+        public bool TryAdvanceTo(T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryAdvanceToAny(System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryCopyTo(System.Span<T> destination) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryPeek(out T value) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryRead(out T value) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, System.ReadOnlySpan<T> delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, T delimiter, T delimiterEscape, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.ReadOnlySpan<T> span, T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.ReadOnlySpan<T> span, T delimiter, T delimiterEscape, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadToAny(out System.Buffers.ReadOnlySequence<T> sequence, System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryReadToAny(out System.ReadOnlySpan<T> span, System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+    }
     public delegate void SpanAction<T, in TArg>(System.Span<T> span, TArg arg);
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
     public readonly partial struct StandardFormat : System.IEquatable<System.Buffers.StandardFormat>
@@ -5947,6 +6009,7 @@ namespace System.Buffers
         public static System.Buffers.StandardFormat Parse(System.ReadOnlySpan<char> format) { throw null; }
         public static System.Buffers.StandardFormat Parse(string format) { throw null; }
         public override string ToString() { throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> format, out System.Buffers.StandardFormat result) { throw null; }
     }
 }
 namespace System.Buffers.Binary
@@ -7507,6 +7570,55 @@ namespace System.Diagnostics
 }
 namespace System.Diagnostics.CodeAnalysis
 {
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, Inherited=false)]
+    public sealed partial class AllowNullAttribute : System.Attribute
+    {
+        public AllowNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, Inherited=false)]
+    public sealed partial class DisallowNullAttribute : System.Attribute
+    {
+        public DisallowNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Method, Inherited=false)]
+    public sealed partial class DoesNotReturnAttribute : System.Attribute
+    {
+        public DoesNotReturnAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class DoesNotReturnIfAttribute : System.Attribute
+    {
+        public DoesNotReturnIfAttribute(bool parameterValue) { }
+        public bool ParameterValue { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, Inherited=false)]
+    public sealed partial class MaybeNullAttribute : System.Attribute
+    {
+        public MaybeNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class MaybeNullWhenAttribute : System.Attribute
+    {
+        public MaybeNullWhenAttribute(bool returnValue) { }
+        public bool ReturnValue { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, Inherited=false)]
+    public sealed partial class NotNullAttribute : System.Attribute
+    {
+        public NotNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, AllowMultiple=true, Inherited=false)]
+    public sealed partial class NotNullIfNotNullAttribute : System.Attribute
+    {
+        public NotNullIfNotNullAttribute(string parameterName) { }
+        public string ParameterName { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class NotNullWhenAttribute : System.Attribute
+    {
+        public NotNullWhenAttribute(bool returnValue) { }
+        public bool ReturnValue { get { throw null; } }
+    }
     [System.AttributeUsageAttribute(System.AttributeTargets.All, Inherited=false, AllowMultiple=true)]
     [System.Diagnostics.ConditionalAttribute("CODE_ANALYSIS")]
     public sealed partial class SuppressMessageAttribute : System.Attribute
@@ -15480,6 +15592,7 @@ namespace System.Runtime.InteropServices
         public static bool TryGetArray<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.ArraySegment<T> segment) { throw null; }
         public static bool TryGetReadOnlyMemory<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.ReadOnlyMemory<T> memory) { throw null; }
         public static bool TryGetReadOnlySequenceSegment<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.Buffers.ReadOnlySequenceSegment<T> startSegment, out int startIndex, out System.Buffers.ReadOnlySequenceSegment<T> endSegment, out int endIndex) { throw null; }
+        public static bool TryRead<T>(ref System.Buffers.SequenceReader<byte> reader, out T value) where T : struct { throw null; }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Assembly, Inherited=false)]
     [System.ObsoleteAttribute("This attribute has been deprecated.  Application Domains no longer respect Activation Context boundaries in IDispatch calls.", false)]
diff --git a/profiles/monotouch/Facades/netstandard.cs b/profiles/monotouch/Facades/netstandard.cs
index faec721..9072ff6 100644
--- a/profiles/monotouch/Facades/netstandard.cs
+++ b/profiles/monotouch/Facades/netstandard.cs
@@ -79,6 +79,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Base64FormattingOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.BitConverter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffer))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ArrayBufferWriter<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ArrayPool<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.Binary.BinaryPrimitives))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.BuffersExtensions))]
@@ -92,6 +93,8 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySequence<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySequenceSegment<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySpanAction<,>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SequenceReader<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SequenceReaderExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SpanAction<,>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.StandardFormat))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.Text.Base64))]
@@ -515,6 +518,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowChangeEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowChangeEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowComparer))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowComparer<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowState))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowVersion))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowView))]
@@ -525,6 +531,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableClearEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableClearEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableNewRowEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableNewRowEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableReader))]
@@ -537,6 +544,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DbType))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DeletedRowInaccessibleException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DuplicateNameException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollection<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollectionExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EvaluateException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.FillErrorEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.FillErrorEventHandler))]
@@ -569,6 +579,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.MissingPrimaryKeyException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.MissingSchemaAction))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.NoNullAllowedException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.OrderedEnumerableRowCollection<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.ParameterDirection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.PropertyCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.ReadOnlyException))]
@@ -609,6 +620,8 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.StatementType))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.StrongTypingException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.SyntaxErrorException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.TypedTableBase<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.TypedTableBaseExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UniqueConstraint))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UpdateRowSource))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UpdateStatus))]
@@ -623,7 +636,16 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DBNull))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Delegate))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.BooleanSwitch))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.AllowNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DisallowNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DoesNotReturnAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DoesNotReturnIfAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverageAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.MaybeNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.MaybeNullWhenAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullIfNotNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullWhenAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.SuppressMessageAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.ConditionalAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Contracts.Contract))]
diff --git a/profiles/monotouch/System.Data.DataSetExtensions.cs b/profiles/monotouch/System.Data.DataSetExtensions.cs
new file mode 100644
index 0000000..0971f7d
--- /dev/null
+++ b/profiles/monotouch/System.Data.DataSetExtensions.cs
@@ -0,0 +1,107 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+[assembly:System.Reflection.AssemblyVersionAttribute("2.0.5.0")]
+[assembly:System.CLSCompliantAttribute(true)]
+[assembly:System.Diagnostics.DebuggableAttribute(System.Diagnostics.DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints)]
+[assembly:System.Reflection.AssemblyCompanyAttribute("Mono development team")]
+[assembly:System.Reflection.AssemblyCopyrightAttribute("(c) Various Mono authors")]
+[assembly:System.Reflection.AssemblyDefaultAliasAttribute("System.Data.DataSetExtensions.dll")]
+[assembly:System.Reflection.AssemblyDescriptionAttribute("System.Data.DataSetExtensions.dll")]
+[assembly:System.Reflection.AssemblyFileVersionAttribute("4.0.50524.0")]
+[assembly:System.Reflection.AssemblyInformationalVersionAttribute("4.0.50524.0")]
+[assembly:System.Reflection.AssemblyProductAttribute("Mono Common Language Infrastructure")]
+[assembly:System.Reflection.AssemblyTitleAttribute("System.Data.DataSetExtensions.dll")]
+[assembly:System.Resources.NeutralResourcesLanguageAttribute("en-US")]
+[assembly:System.Resources.SatelliteContractVersionAttribute("2.0.5.0")]
+[assembly:System.Runtime.CompilerServices.CompilationRelaxationsAttribute(System.Runtime.CompilerServices.CompilationRelaxations.NoStringInterning)]
+[assembly:System.Runtime.CompilerServices.RuntimeCompatibilityAttribute(WrapNonExceptionThrows=true)]
+[assembly:System.Runtime.InteropServices.ComCompatibleVersionAttribute(1, 0, 3300, 0)]
+[assembly:System.Runtime.InteropServices.ComVisibleAttribute(false)]
+[assembly:System.Security.AllowPartiallyTrustedCallersAttribute]
+[assembly:System.Security.SecurityCriticalAttribute]
+namespace System.Data
+{
+    public static partial class DataRowComparer
+    {
+        public static System.Data.DataRowComparer<System.Data.DataRow> Default { get { throw null; } }
+    }
+    public sealed partial class DataRowComparer<TRow> : System.Collections.Generic.IEqualityComparer<TRow> where TRow : System.Data.DataRow
+    {
+        internal DataRowComparer() { }
+        public static System.Data.DataRowComparer<TRow> Default { get { throw null; } }
+        public bool Equals(TRow leftRow, TRow rightRow) { throw null; }
+        public int GetHashCode(TRow row) { throw null; }
+    }
+    public static partial class DataRowExtensions
+    {
+        public static T Field<T>(this System.Data.DataRow row, System.Data.DataColumn column) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, System.Data.DataColumn column, System.Data.DataRowVersion version) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, int columnIndex) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, int columnIndex, System.Data.DataRowVersion version) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, string columnName) { throw null; }
+        public static T Field<T>(this System.Data.DataRow row, string columnName, System.Data.DataRowVersion version) { throw null; }
+        public static void SetField<T>(this System.Data.DataRow row, System.Data.DataColumn column, T value) { }
+        public static void SetField<T>(this System.Data.DataRow row, int columnIndex, T value) { }
+        public static void SetField<T>(this System.Data.DataRow row, string columnName, T value) { }
+    }
+    public static partial class DataTableExtensions
+    {
+        public static System.Data.DataView AsDataView(this System.Data.DataTable table) { throw null; }
+        public static System.Data.DataView AsDataView<T>(this System.Data.EnumerableRowCollection<T> source) where T : System.Data.DataRow { throw null; }
+        public static System.Data.EnumerableRowCollection<System.Data.DataRow> AsEnumerable(this System.Data.DataTable source) { throw null; }
+        public static System.Data.DataTable CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source) where T : System.Data.DataRow { throw null; }
+        public static void CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source, System.Data.DataTable table, System.Data.LoadOption options) where T : System.Data.DataRow { }
+        public static void CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source, System.Data.DataTable table, System.Data.LoadOption options, System.Data.FillErrorEventHandler errorHandler) where T : System.Data.DataRow { }
+    }
+    public abstract partial class EnumerableRowCollection : System.Collections.IEnumerable
+    {
+        internal EnumerableRowCollection() { }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
+    public static partial class EnumerableRowCollectionExtensions
+    {
+        public static System.Data.EnumerableRowCollection<TResult> Cast<TResult>(this System.Data.EnumerableRowCollection source) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.EnumerableRowCollection<S> Select<TRow, S>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, S> selector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenByDescending<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenByDescending<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenBy<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector) { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> ThenBy<TRow, TKey>(this System.Data.OrderedEnumerableRowCollection<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) { throw null; }
+        public static System.Data.EnumerableRowCollection<TRow> Where<TRow>(this System.Data.EnumerableRowCollection<TRow> source, System.Func<TRow, bool> predicate) { throw null; }
+    }
+    public partial class EnumerableRowCollection<TRow> : System.Data.EnumerableRowCollection, System.Collections.Generic.IEnumerable<TRow>, System.Collections.IEnumerable
+    {
+        internal EnumerableRowCollection() { }
+        public System.Collections.Generic.IEnumerator<TRow> GetEnumerator() { throw null; }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
+    public sealed partial class OrderedEnumerableRowCollection<TRow> : System.Data.EnumerableRowCollection<TRow>
+    {
+        internal OrderedEnumerableRowCollection() { }
+    }
+    public static partial class TypedTableBaseExtensions
+    {
+        public static System.Data.EnumerableRowCollection<TRow> AsEnumerable<TRow>(this System.Data.TypedTableBase<TRow> source) where TRow : System.Data.DataRow { throw null; }
+        public static TRow ElementAtOrDefault<TRow>(this System.Data.TypedTableBase<TRow> source, int index) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderByDescending<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.OrderedEnumerableRowCollection<TRow> OrderBy<TRow, TKey>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, TKey> keySelector, System.Collections.Generic.IComparer<TKey> comparer) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.EnumerableRowCollection<S> Select<TRow, S>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, S> selector) where TRow : System.Data.DataRow { throw null; }
+        public static System.Data.EnumerableRowCollection<TRow> Where<TRow>(this System.Data.TypedTableBase<TRow> source, System.Func<TRow, bool> predicate) where TRow : System.Data.DataRow { throw null; }
+    }
+    [System.SerializableAttribute]
+    public abstract partial class TypedTableBase<T> : System.Data.DataTable, System.Collections.Generic.IEnumerable<T>, System.Collections.IEnumerable where T : System.Data.DataRow
+    {
+        protected TypedTableBase() { }
+        protected TypedTableBase(System.Runtime.Serialization.SerializationInfo info, System.Runtime.Serialization.StreamingContext context) { }
+        public System.Data.EnumerableRowCollection<TResult> Cast<TResult>() { throw null; }
+        public System.Collections.Generic.IEnumerator<T> GetEnumerator() { throw null; }
+        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator() { throw null; }
+    }
+}
diff --git a/profiles/monotouch/mscorlib.cs b/profiles/monotouch/mscorlib.cs
index d032e2d..af5e5a7 100644
--- a/profiles/monotouch/mscorlib.cs
+++ b/profiles/monotouch/mscorlib.cs
@@ -5808,6 +5808,20 @@ namespace System
 }
 namespace System.Buffers
 {
+    public sealed partial class ArrayBufferWriter<T> : System.Buffers.IBufferWriter<T>
+    {
+        public ArrayBufferWriter() { }
+        public ArrayBufferWriter(int initialCapacity) { }
+        public int Capacity { get { throw null; } }
+        public int FreeCapacity { get { throw null; } }
+        public int WrittenCount { get { throw null; } }
+        public System.ReadOnlyMemory<T> WrittenMemory { get { throw null; } }
+        public System.ReadOnlySpan<T> WrittenSpan { get { throw null; } }
+        public void Advance(int count) { }
+        public void Clear() { }
+        public System.Memory<T> GetMemory(int sizeHint = 0) { throw null; }
+        public System.Span<T> GetSpan(int sizeHint = 0) { throw null; }
+    }
     public abstract partial class ArrayPool<T>
     {
         protected ArrayPool() { }
@@ -5892,17 +5906,19 @@ namespace System.Buffers
     public readonly partial struct ReadOnlySequence<T>
     {
         private readonly object _dummy;
+        private readonly int _dummyPrimitive;
         public static readonly System.Buffers.ReadOnlySequence<T> Empty;
         public ReadOnlySequence(System.Buffers.ReadOnlySequenceSegment<T> startSegment, int startIndex, System.Buffers.ReadOnlySequenceSegment<T> endSegment, int endIndex) { throw null; }
         public ReadOnlySequence(System.ReadOnlyMemory<T> memory) { throw null; }
         public ReadOnlySequence(T[] array) { throw null; }
         public ReadOnlySequence(T[] array, int start, int length) { throw null; }
-        public System.SequencePosition End { get { throw null; } }
+        public System.SequencePosition End { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public System.ReadOnlyMemory<T> First { get { throw null; } }
+        public System.ReadOnlySpan<T> FirstSpan { get { throw null; } }
         public bool IsEmpty { get { throw null; } }
         public bool IsSingleSegment { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public long Length { get { throw null; } }
-        public System.SequencePosition Start { get { throw null; } }
+        public System.SequencePosition Start { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public System.Buffers.ReadOnlySequence<T>.Enumerator GetEnumerator() { throw null; }
         public System.SequencePosition GetPosition(long offset) { throw null; }
         public System.SequencePosition GetPosition(long offset, System.SequencePosition origin) { throw null; }
@@ -5927,6 +5943,52 @@ namespace System.Buffers
         }
     }
     public delegate void ReadOnlySpanAction<T, in TArg>(System.ReadOnlySpan<T> span, TArg arg);
+    public static partial class SequenceReaderExtensions
+    {
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out short value) { throw null; }
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out int value) { throw null; }
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out long value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out short value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out int value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out long value) { throw null; }
+    }
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public ref partial struct SequenceReader<T> where T : struct, System.IEquatable<T>
+    {
+        private object _dummy;
+        private int _dummyPrimitive;
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public SequenceReader(System.Buffers.ReadOnlySequence<T> sequence) { throw null; }
+        public long Consumed { get { throw null; } }
+        public System.ReadOnlySpan<T> CurrentSpan { get { throw null; } }
+        public int CurrentSpanIndex { get { throw null; } }
+        public bool End { get { throw null; } }
+        public long Length { get { throw null; } }
+        public System.SequencePosition Position { get { throw null; } }
+        public long Remaining { get { throw null; } }
+        public System.Buffers.ReadOnlySequence<T> Sequence { get { throw null; } }
+        public System.ReadOnlySpan<T> UnreadSpan { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public void Advance(long count) { }
+        public long AdvancePast(T value) { throw null; }
+        public long AdvancePastAny(System.ReadOnlySpan<T> values) { throw null; }
+        public long AdvancePastAny(T value0, T value1) { throw null; }
+        public long AdvancePastAny(T value0, T value1, T value2) { throw null; }
+        public long AdvancePastAny(T value0, T value1, T value2, T value3) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool IsNext(System.ReadOnlySpan<T> next, bool advancePast = false) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool IsNext(T next, bool advancePast = false) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public void Rewind(long count) { }
+        public bool TryAdvanceTo(T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryAdvanceToAny(System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryCopyTo(System.Span<T> destination) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryPeek(out T value) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryRead(out T value) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, System.ReadOnlySpan<T> delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, T delimiter, T delimiterEscape, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.ReadOnlySpan<T> span, T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.ReadOnlySpan<T> span, T delimiter, T delimiterEscape, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadToAny(out System.Buffers.ReadOnlySequence<T> sequence, System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryReadToAny(out System.ReadOnlySpan<T> span, System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+    }
     public delegate void SpanAction<T, in TArg>(System.Span<T> span, TArg arg);
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
     public readonly partial struct StandardFormat : System.IEquatable<System.Buffers.StandardFormat>
@@ -5948,6 +6010,7 @@ namespace System.Buffers
         public static System.Buffers.StandardFormat Parse(System.ReadOnlySpan<char> format) { throw null; }
         public static System.Buffers.StandardFormat Parse(string format) { throw null; }
         public override string ToString() { throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> format, out System.Buffers.StandardFormat result) { throw null; }
     }
 }
 namespace System.Buffers.Binary
@@ -7508,6 +7571,55 @@ namespace System.Diagnostics
 }
 namespace System.Diagnostics.CodeAnalysis
 {
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, Inherited=false)]
+    public sealed partial class AllowNullAttribute : System.Attribute
+    {
+        public AllowNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, Inherited=false)]
+    public sealed partial class DisallowNullAttribute : System.Attribute
+    {
+        public DisallowNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Method, Inherited=false)]
+    public sealed partial class DoesNotReturnAttribute : System.Attribute
+    {
+        public DoesNotReturnAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class DoesNotReturnIfAttribute : System.Attribute
+    {
+        public DoesNotReturnIfAttribute(bool parameterValue) { }
+        public bool ParameterValue { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, Inherited=false)]
+    public sealed partial class MaybeNullAttribute : System.Attribute
+    {
+        public MaybeNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class MaybeNullWhenAttribute : System.Attribute
+    {
+        public MaybeNullWhenAttribute(bool returnValue) { }
+        public bool ReturnValue { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, Inherited=false)]
+    public sealed partial class NotNullAttribute : System.Attribute
+    {
+        public NotNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, AllowMultiple=true, Inherited=false)]
+    public sealed partial class NotNullIfNotNullAttribute : System.Attribute
+    {
+        public NotNullIfNotNullAttribute(string parameterName) { }
+        public string ParameterName { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class NotNullWhenAttribute : System.Attribute
+    {
+        public NotNullWhenAttribute(bool returnValue) { }
+        public bool ReturnValue { get { throw null; } }
+    }
     [System.AttributeUsageAttribute(System.AttributeTargets.All, Inherited=false, AllowMultiple=true)]
     [System.Diagnostics.ConditionalAttribute("CODE_ANALYSIS")]
     public sealed partial class SuppressMessageAttribute : System.Attribute
@@ -15294,6 +15406,7 @@ namespace System.Runtime.InteropServices
         public static bool TryGetArray<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.ArraySegment<T> segment) { throw null; }
         public static bool TryGetReadOnlyMemory<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.ReadOnlyMemory<T> memory) { throw null; }
         public static bool TryGetReadOnlySequenceSegment<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.Buffers.ReadOnlySequenceSegment<T> startSegment, out int startIndex, out System.Buffers.ReadOnlySequenceSegment<T> endSegment, out int endIndex) { throw null; }
+        public static bool TryRead<T>(ref System.Buffers.SequenceReader<byte> reader, out T value) where T : struct { throw null; }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Assembly, Inherited=false)]
     [System.ObsoleteAttribute("This attribute has been deprecated.  Application Domains no longer respect Activation Context boundaries in IDispatch calls.", false)]
diff --git a/profiles/net_4_x/Facades/netstandard.cs b/profiles/net_4_x/Facades/netstandard.cs
index faec721..9072ff6 100644
--- a/profiles/net_4_x/Facades/netstandard.cs
+++ b/profiles/net_4_x/Facades/netstandard.cs
@@ -79,6 +79,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Base64FormattingOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.BitConverter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffer))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ArrayBufferWriter<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ArrayPool<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.Binary.BinaryPrimitives))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.BuffersExtensions))]
@@ -92,6 +93,8 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySequence<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySequenceSegment<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.ReadOnlySpanAction<,>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SequenceReader<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SequenceReaderExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.SpanAction<,>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.StandardFormat))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Buffers.Text.Base64))]
@@ -515,6 +518,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowChangeEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowChangeEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowComparer))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowComparer<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowState))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowVersion))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRowView))]
@@ -525,6 +531,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableClearEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableClearEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableNewRowEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableNewRowEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataTableReader))]
@@ -537,6 +544,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DbType))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DeletedRowInaccessibleException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DuplicateNameException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollection))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollection<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EnumerableRowCollectionExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.EvaluateException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.FillErrorEventArgs))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.FillErrorEventHandler))]
@@ -569,6 +579,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.MissingPrimaryKeyException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.MissingSchemaAction))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.NoNullAllowedException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.OrderedEnumerableRowCollection<>))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.ParameterDirection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.PropertyCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.ReadOnlyException))]
@@ -609,6 +620,8 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.StatementType))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.StrongTypingException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.SyntaxErrorException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.TypedTableBase<>))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.TypedTableBaseExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UniqueConstraint))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UpdateRowSource))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.UpdateStatus))]
@@ -623,7 +636,16 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DBNull))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Delegate))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.BooleanSwitch))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.AllowNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DisallowNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DoesNotReturnAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.DoesNotReturnIfAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverageAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.MaybeNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.MaybeNullWhenAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullIfNotNullAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.NotNullWhenAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.CodeAnalysis.SuppressMessageAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.ConditionalAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Contracts.Contract))]
diff --git a/profiles/net_4_x/System.Data.DataSetExtensions.cs b/profiles/net_4_x/System.Data.DataSetExtensions.cs
index 2a31d35..8adb50d 100644
--- a/profiles/net_4_x/System.Data.DataSetExtensions.cs
+++ b/profiles/net_4_x/System.Data.DataSetExtensions.cs
@@ -48,6 +48,8 @@ namespace System.Data
     }
     public static partial class DataTableExtensions
     {
+        public static System.Data.DataView AsDataView(this System.Data.DataTable table) { throw null; }
+        public static System.Data.DataView AsDataView<T>(this System.Data.EnumerableRowCollection<T> source) where T : System.Data.DataRow { throw null; }
         public static System.Data.EnumerableRowCollection<System.Data.DataRow> AsEnumerable(this System.Data.DataTable source) { throw null; }
         public static System.Data.DataTable CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source) where T : System.Data.DataRow { throw null; }
         public static void CopyToDataTable<T>(this System.Collections.Generic.IEnumerable<T> source, System.Data.DataTable table, System.Data.LoadOption options) where T : System.Data.DataRow { }
diff --git a/profiles/net_4_x/mscorlib.cs b/profiles/net_4_x/mscorlib.cs
index 118bf07..a6ead72 100644
--- a/profiles/net_4_x/mscorlib.cs
+++ b/profiles/net_4_x/mscorlib.cs
@@ -5842,6 +5842,20 @@ namespace System
 }
 namespace System.Buffers
 {
+    public sealed partial class ArrayBufferWriter<T> : System.Buffers.IBufferWriter<T>
+    {
+        public ArrayBufferWriter() { }
+        public ArrayBufferWriter(int initialCapacity) { }
+        public int Capacity { get { throw null; } }
+        public int FreeCapacity { get { throw null; } }
+        public int WrittenCount { get { throw null; } }
+        public System.ReadOnlyMemory<T> WrittenMemory { get { throw null; } }
+        public System.ReadOnlySpan<T> WrittenSpan { get { throw null; } }
+        public void Advance(int count) { }
+        public void Clear() { }
+        public System.Memory<T> GetMemory(int sizeHint = 0) { throw null; }
+        public System.Span<T> GetSpan(int sizeHint = 0) { throw null; }
+    }
     public abstract partial class ArrayPool<T>
     {
         protected ArrayPool() { }
@@ -5926,17 +5940,19 @@ namespace System.Buffers
     public readonly partial struct ReadOnlySequence<T>
     {
         private readonly object _dummy;
+        private readonly int _dummyPrimitive;
         public static readonly System.Buffers.ReadOnlySequence<T> Empty;
         public ReadOnlySequence(System.Buffers.ReadOnlySequenceSegment<T> startSegment, int startIndex, System.Buffers.ReadOnlySequenceSegment<T> endSegment, int endIndex) { throw null; }
         public ReadOnlySequence(System.ReadOnlyMemory<T> memory) { throw null; }
         public ReadOnlySequence(T[] array) { throw null; }
         public ReadOnlySequence(T[] array, int start, int length) { throw null; }
-        public System.SequencePosition End { get { throw null; } }
+        public System.SequencePosition End { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public System.ReadOnlyMemory<T> First { get { throw null; } }
+        public System.ReadOnlySpan<T> FirstSpan { get { throw null; } }
         public bool IsEmpty { get { throw null; } }
         public bool IsSingleSegment { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public long Length { get { throw null; } }
-        public System.SequencePosition Start { get { throw null; } }
+        public System.SequencePosition Start { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
         public System.Buffers.ReadOnlySequence<T>.Enumerator GetEnumerator() { throw null; }
         public System.SequencePosition GetPosition(long offset) { throw null; }
         public System.SequencePosition GetPosition(long offset, System.SequencePosition origin) { throw null; }
@@ -5961,6 +5977,52 @@ namespace System.Buffers
         }
     }
     public delegate void ReadOnlySpanAction<T, in TArg>(System.ReadOnlySpan<T> span, TArg arg);
+    public static partial class SequenceReaderExtensions
+    {
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out short value) { throw null; }
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out int value) { throw null; }
+        public static bool TryReadBigEndian(this ref System.Buffers.SequenceReader<byte> reader, out long value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out short value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out int value) { throw null; }
+        public static bool TryReadLittleEndian(this ref System.Buffers.SequenceReader<byte> reader, out long value) { throw null; }
+    }
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public ref partial struct SequenceReader<T> where T : struct, System.IEquatable<T>
+    {
+        private object _dummy;
+        private int _dummyPrimitive;
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public SequenceReader(System.Buffers.ReadOnlySequence<T> sequence) { throw null; }
+        public long Consumed { get { throw null; } }
+        public System.ReadOnlySpan<T> CurrentSpan { get { throw null; } }
+        public int CurrentSpanIndex { get { throw null; } }
+        public bool End { get { throw null; } }
+        public long Length { get { throw null; } }
+        public System.SequencePosition Position { get { throw null; } }
+        public long Remaining { get { throw null; } }
+        public System.Buffers.ReadOnlySequence<T> Sequence { get { throw null; } }
+        public System.ReadOnlySpan<T> UnreadSpan { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public void Advance(long count) { }
+        public long AdvancePast(T value) { throw null; }
+        public long AdvancePastAny(System.ReadOnlySpan<T> values) { throw null; }
+        public long AdvancePastAny(T value0, T value1) { throw null; }
+        public long AdvancePastAny(T value0, T value1, T value2) { throw null; }
+        public long AdvancePastAny(T value0, T value1, T value2, T value3) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool IsNext(System.ReadOnlySpan<T> next, bool advancePast = false) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool IsNext(T next, bool advancePast = false) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public void Rewind(long count) { }
+        public bool TryAdvanceTo(T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryAdvanceToAny(System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryCopyTo(System.Span<T> destination) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryPeek(out T value) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryRead(out T value) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, System.ReadOnlySpan<T> delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.Buffers.ReadOnlySequence<T> sequence, T delimiter, T delimiterEscape, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.ReadOnlySpan<T> span, T delimiter, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadTo(out System.ReadOnlySpan<T> span, T delimiter, T delimiterEscape, bool advancePastDelimiter = true) { throw null; }
+        public bool TryReadToAny(out System.Buffers.ReadOnlySequence<T> sequence, System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public bool TryReadToAny(out System.ReadOnlySpan<T> span, System.ReadOnlySpan<T> delimiters, bool advancePastDelimiter = true) { throw null; }
+    }
     public delegate void SpanAction<T, in TArg>(System.Span<T> span, TArg arg);
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
     public readonly partial struct StandardFormat : System.IEquatable<System.Buffers.StandardFormat>
@@ -5982,6 +6044,7 @@ namespace System.Buffers
         public static System.Buffers.StandardFormat Parse(System.ReadOnlySpan<char> format) { throw null; }
         public static System.Buffers.StandardFormat Parse(string format) { throw null; }
         public override string ToString() { throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> format, out System.Buffers.StandardFormat result) { throw null; }
     }
 }
 namespace System.Buffers.Binary
@@ -7542,6 +7605,55 @@ namespace System.Diagnostics
 }
 namespace System.Diagnostics.CodeAnalysis
 {
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, Inherited=false)]
+    public sealed partial class AllowNullAttribute : System.Attribute
+    {
+        public AllowNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, Inherited=false)]
+    public sealed partial class DisallowNullAttribute : System.Attribute
+    {
+        public DisallowNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Method, Inherited=false)]
+    public sealed partial class DoesNotReturnAttribute : System.Attribute
+    {
+        public DoesNotReturnAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class DoesNotReturnIfAttribute : System.Attribute
+    {
+        public DoesNotReturnIfAttribute(bool parameterValue) { }
+        public bool ParameterValue { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, Inherited=false)]
+    public sealed partial class MaybeNullAttribute : System.Attribute
+    {
+        public MaybeNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class MaybeNullWhenAttribute : System.Attribute
+    {
+        public MaybeNullWhenAttribute(bool returnValue) { }
+        public bool ReturnValue { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, Inherited=false)]
+    public sealed partial class NotNullAttribute : System.Attribute
+    {
+        public NotNullAttribute() { }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, AllowMultiple=true, Inherited=false)]
+    public sealed partial class NotNullIfNotNullAttribute : System.Attribute
+    {
+        public NotNullIfNotNullAttribute(string parameterName) { }
+        public string ParameterName { get { throw null; } }
+    }
+    [System.AttributeUsageAttribute(System.AttributeTargets.Parameter, Inherited=false)]
+    public sealed partial class NotNullWhenAttribute : System.Attribute
+    {
+        public NotNullWhenAttribute(bool returnValue) { }
+        public bool ReturnValue { get { throw null; } }
+    }
     [System.AttributeUsageAttribute(System.AttributeTargets.All, Inherited=false, AllowMultiple=true)]
     [System.Diagnostics.ConditionalAttribute("CODE_ANALYSIS")]
     public sealed partial class SuppressMessageAttribute : System.Attribute
@@ -15643,6 +15755,7 @@ namespace System.Runtime.InteropServices
         public static bool TryGetArray<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.ArraySegment<T> segment) { throw null; }
         public static bool TryGetReadOnlyMemory<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.ReadOnlyMemory<T> memory) { throw null; }
         public static bool TryGetReadOnlySequenceSegment<T>(System.Buffers.ReadOnlySequence<T> sequence, out System.Buffers.ReadOnlySequenceSegment<T> startSegment, out int startIndex, out System.Buffers.ReadOnlySequenceSegment<T> endSegment, out int endIndex) { throw null; }
+        public static bool TryRead<T>(ref System.Buffers.SequenceReader<byte> reader, out T value) where T : struct { throw null; }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Assembly, Inherited=false)]
     [System.ObsoleteAttribute("This attribute has been deprecated.  Application Domains no longer respect Activation Context boundaries in IDispatch calls.", false)]