Apply changes from https://github.com/mono/mono/pull/15696 to API snapshot

12 files changed, 348 insertions, 27 deletions

diff --git a/profiles/monodroid/Facades/netstandard.cs b/profiles/monodroid/Facades/netstandard.cs
index f435448..faec721 100644
--- a/profiles/monodroid/Facades/netstandard.cs
+++ b/profiles/monodroid/Facades/netstandard.cs
@@ -2,14 +2,14 @@
 // 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("2.0.0.0")]
+[assembly:System.Reflection.AssemblyVersionAttribute("2.1.0.0")]
 [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("netstandard")]
 [assembly:System.Reflection.AssemblyDescriptionAttribute("netstandard")]
-[assembly:System.Reflection.AssemblyFileVersionAttribute("2.0.0.0")]
-[assembly:System.Reflection.AssemblyInformationalVersionAttribute("2.0.0.0")]
+[assembly:System.Reflection.AssemblyFileVersionAttribute("2.1.0.0")]
+[assembly:System.Reflection.AssemblyInformationalVersionAttribute("2.1.0.0")]
 [assembly:System.Reflection.AssemblyProductAttribute("Mono Common Language Infrastructure")]
 [assembly:System.Reflection.AssemblyTitleAttribute("netstandard")]
 [assembly:System.Runtime.CompilerServices.CompilationRelaxationsAttribute(8)]
@@ -506,6 +506,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataColumnChangeEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataColumnCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataReaderExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRelation))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRelationCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRow))]
@@ -706,6 +707,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceSource))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceSwitch))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.DiagnosticCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventActivityOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventChannel))]
@@ -731,7 +733,10 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventTags))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventTask))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventWrittenEventArgs))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.IncrementingEventCounter))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.IncrementingPollingCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.NonEventAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.PollingCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DivideByZeroException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DllNotFoundException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Drawing.Color))]
@@ -1478,6 +1483,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.ResourceWriter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.SatelliteContractVersionAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.UltimateResourceFallbackLocation))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.AmbiguousImplementationException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.AssemblyTargetedPatchBandAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.CompilerServices.AccessedThroughPropertyAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.CompilerServices.AsyncIteratorMethodBuilder))]
@@ -1833,7 +1839,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Claims.ClaimTypes))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Claims.ClaimValueTypes))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.Aes))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesCcm))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesCryptoServiceProvider))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesGcm))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesManaged))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AsnEncodedData))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AsnEncodedDataCollection))]
diff --git a/profiles/monodroid/System.Data.cs b/profiles/monodroid/System.Data.cs
index 444cb32..9977513 100644
--- a/profiles/monodroid/System.Data.cs
+++ b/profiles/monodroid/System.Data.cs
@@ -595,6 +595,38 @@ namespace System.Data
         public DataException(string s) { }
         public DataException(string s, System.Exception innerException) { }
     }
+    public static partial class DataReaderExtensions
+    {
+        public static bool GetBoolean(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static byte GetByte(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetBytes(this System.Data.Common.DbDataReader reader, string name, long dataOffset, byte[] buffer, int bufferOffset, int length) { throw null; }
+        public static char GetChar(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetChars(this System.Data.Common.DbDataReader reader, string name, long dataOffset, char[] buffer, int bufferOffset, int length) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static System.Data.Common.DbDataReader GetData(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static string GetDataTypeName(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.DateTime GetDateTime(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static decimal GetDecimal(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static double GetDouble(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Type GetFieldType(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Threading.Tasks.Task<T> GetFieldValueAsync<T>(this System.Data.Common.DbDataReader reader, string name, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public static T GetFieldValue<T>(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static float GetFloat(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Guid GetGuid(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static short GetInt16(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static int GetInt32(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetInt64(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static System.Type GetProviderSpecificFieldType(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static object GetProviderSpecificValue(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.IO.Stream GetStream(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static string GetString(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.IO.TextReader GetTextReader(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static object GetValue(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static bool IsDBNull(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Threading.Tasks.Task<bool> IsDBNullAsync(this System.Data.Common.DbDataReader reader, string name, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+    }
     [System.ComponentModel.DefaultPropertyAttribute("RelationName")]
     [System.ComponentModel.TypeConverterAttribute("System.Data.RelationshipConverter")]
     public partial class DataRelation
@@ -2138,7 +2170,7 @@ namespace System.Data.Common
         public System.Nullable<int> NumericScale { get { throw null; } protected set { } }
         public string UdtAssemblyQualifiedName { get { throw null; } protected set { } }
     }
-    public abstract partial class DbCommand : System.ComponentModel.Component, System.Data.IDbCommand, System.IDisposable
+    public abstract partial class DbCommand : System.ComponentModel.Component, System.Data.IDbCommand, System.IAsyncDisposable, System.IDisposable
     {
         protected DbCommand() { }
         [System.ComponentModel.DefaultValueAttribute("")]
@@ -2175,6 +2207,7 @@ namespace System.Data.Common
         public abstract void Cancel();
         protected abstract System.Data.Common.DbParameter CreateDbParameter();
         public System.Data.Common.DbParameter CreateParameter() { throw null; }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         protected abstract System.Data.Common.DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior);
         protected virtual System.Threading.Tasks.Task<System.Data.Common.DbDataReader> ExecuteDbDataReaderAsync(System.Data.CommandBehavior behavior, System.Threading.CancellationToken cancellationToken) { throw null; }
         public abstract int ExecuteNonQuery();
@@ -2190,6 +2223,7 @@ namespace System.Data.Common
         public System.Threading.Tasks.Task<object> ExecuteScalarAsync() { throw null; }
         public virtual System.Threading.Tasks.Task<object> ExecuteScalarAsync(System.Threading.CancellationToken cancellationToken) { throw null; }
         public abstract void Prepare();
+        public virtual System.Threading.Tasks.Task PrepareAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         System.Data.IDbDataParameter System.Data.IDbCommand.CreateParameter() { throw null; }
         System.Data.IDataReader System.Data.IDbCommand.ExecuteReader() { throw null; }
         System.Data.IDataReader System.Data.IDbCommand.ExecuteReader(System.Data.CommandBehavior behavior) { throw null; }
@@ -2233,7 +2267,7 @@ namespace System.Data.Common
         protected abstract void SetRowUpdatingHandler(System.Data.Common.DbDataAdapter adapter);
         public virtual string UnquoteIdentifier(string quotedIdentifier) { throw null; }
     }
-    public abstract partial class DbConnection : System.ComponentModel.Component, System.Data.IDbConnection, System.IDisposable
+    public abstract partial class DbConnection : System.ComponentModel.Component, System.Data.IDbConnection, System.IAsyncDisposable, System.IDisposable
     {
         protected DbConnection() { }
         [System.ComponentModel.DefaultValueAttribute("")]
@@ -2251,12 +2285,18 @@ namespace System.Data.Common
         public abstract System.Data.ConnectionState State { get; }
         public virtual event System.Data.StateChangeEventHandler StateChange { add { } remove { } }
         protected abstract System.Data.Common.DbTransaction BeginDbTransaction(System.Data.IsolationLevel isolationLevel);
+        protected virtual System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginDbTransactionAsync(System.Data.IsolationLevel isolationLevel, System.Threading.CancellationToken cancellationToken) { throw null; }
         public System.Data.Common.DbTransaction BeginTransaction() { throw null; }
         public System.Data.Common.DbTransaction BeginTransaction(System.Data.IsolationLevel isolationLevel) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginTransactionAsync(System.Data.IsolationLevel isolationLevel, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginTransactionAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public abstract void ChangeDatabase(string databaseName);
+        public virtual System.Threading.Tasks.Task ChangeDatabaseAsync(string databaseName, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public abstract void Close();
+        public virtual System.Threading.Tasks.Task CloseAsync() { throw null; }
         public System.Data.Common.DbCommand CreateCommand() { throw null; }
         protected abstract System.Data.Common.DbCommand CreateDbCommand();
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public virtual void EnlistTransaction(System.Transactions.Transaction transaction) { }
         public virtual System.Data.DataTable GetSchema() { throw null; }
         public virtual System.Data.DataTable GetSchema(string collectionName) { throw null; }
@@ -2422,7 +2462,7 @@ namespace System.Data.Common
         [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
         public bool ShouldSerializeKeyRestrictions() { throw null; }
     }
-    public abstract partial class DbDataReader : System.MarshalByRefObject, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable
+    public abstract partial class DbDataReader : System.MarshalByRefObject, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IAsyncDisposable, System.IDisposable
     {
         protected DbDataReader() { }
         public abstract int Depth { get; }
@@ -2434,9 +2474,11 @@ namespace System.Data.Common
         public abstract int RecordsAffected { get; }
         public virtual int VisibleFieldCount { get { throw null; } }
         public virtual void Close() { }
+        public virtual System.Threading.Tasks.Task CloseAsync() { throw null; }
         [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public abstract bool GetBoolean(int ordinal);
         public abstract byte GetByte(int ordinal);
         public abstract long GetBytes(int ordinal, long dataOffset, byte[] buffer, int bufferOffset, int length);
@@ -2707,6 +2749,8 @@ namespace System.Data.Common
     public abstract partial class DbProviderFactory
     {
         protected DbProviderFactory() { }
+        public virtual bool CanCreateCommandBuilder { get { throw null; } }
+        public virtual bool CanCreateDataAdapter { get { throw null; } }
         public virtual bool CanCreateDataSourceEnumerator { get { throw null; } }
         public virtual System.Data.Common.DbCommand CreateCommand() { throw null; }
         public virtual System.Data.Common.DbCommandBuilder CreateCommandBuilder() { throw null; }
@@ -2724,7 +2768,7 @@ namespace System.Data.Common
         public DbProviderSpecificTypePropertyAttribute(bool isProviderSpecificTypeProperty) { }
         public bool IsProviderSpecificTypeProperty { get { throw null; } }
     }
-    public abstract partial class DbTransaction : System.MarshalByRefObject, System.Data.IDbTransaction, System.IDisposable
+    public abstract partial class DbTransaction : System.MarshalByRefObject, System.Data.IDbTransaction, System.IAsyncDisposable, System.IDisposable
     {
         protected DbTransaction() { }
         public System.Data.Common.DbConnection Connection { get { throw null; } }
@@ -2732,9 +2776,12 @@ namespace System.Data.Common
         public abstract System.Data.IsolationLevel IsolationLevel { get; }
         System.Data.IDbConnection System.Data.IDbTransaction.Connection { get { throw null; } }
         public abstract void Commit();
+        public virtual System.Threading.Tasks.Task CommitAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public abstract void Rollback();
+        public virtual System.Threading.Tasks.Task RollbackAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
     }
     public enum GroupByBehavior
     {
diff --git a/profiles/monodroid/System.Net.Http.cs b/profiles/monodroid/System.Net.Http.cs
index 8afeb1d..507b05e 100644
--- a/profiles/monodroid/System.Net.Http.cs
+++ b/profiles/monodroid/System.Net.Http.cs
@@ -211,6 +211,7 @@ namespace System.Net.Http
         public string ReasonPhrase { get { throw null; } set { } }
         public System.Net.Http.HttpRequestMessage RequestMessage { get { throw null; } set { } }
         public System.Net.HttpStatusCode StatusCode { get { throw null; } set { } }
+        public System.Net.Http.Headers.HttpResponseHeaders TrailingHeaders { get { throw null; } }
         public System.Version Version { get { throw null; } set { } }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
diff --git a/profiles/monodroid/mscorlib.cs b/profiles/monodroid/mscorlib.cs
index 8ed38b0..2acb945 100644
--- a/profiles/monodroid/mscorlib.cs
+++ b/profiles/monodroid/mscorlib.cs
@@ -7874,6 +7874,16 @@ namespace System.Diagnostics.SymbolStore
 }
 namespace System.Diagnostics.Tracing
 {
+    public abstract partial class DiagnosticCounter : System.IDisposable
+    {
+        internal DiagnosticCounter() { }
+        public string DisplayName { get { throw null; } set { } }
+        public string DisplayUnits { get { throw null; } set { } }
+        public System.Diagnostics.Tracing.EventSource EventSource { get { throw null; } }
+        public string Name { get { throw null; } }
+        public void AddMetadata(string key, string value) { }
+        public void Dispose() { }
+    }
     [System.FlagsAttribute]
     public enum EventActivityOptions
     {
@@ -7920,10 +7930,10 @@ namespace System.Diagnostics.Tracing
         public bool DisableEvent(int eventId) { throw null; }
         public bool EnableEvent(int eventId) { throw null; }
     }
-    public partial class EventCounter : System.IDisposable
+    public partial class EventCounter : System.Diagnostics.Tracing.DiagnosticCounter
     {
         public EventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
-        public void Dispose() { }
+        public void WriteMetric(double value) { }
         public void WriteMetric(float value) { }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Struct, Inherited=false)]
@@ -8151,18 +8161,35 @@ namespace System.Diagnostics.Tracing
         public System.Diagnostics.Tracing.EventLevel Level { get { throw null; } }
         public string Message { get { throw null; } }
         public System.Diagnostics.Tracing.EventOpcode Opcode { get { throw null; } }
+        public long OSThreadId { get { throw null; } }
         public System.Collections.ObjectModel.ReadOnlyCollection<object> Payload { get { throw null; } }
         public System.Collections.ObjectModel.ReadOnlyCollection<string> PayloadNames { get { throw null; } }
         public System.Guid RelatedActivityId { get { throw null; } }
         public System.Diagnostics.Tracing.EventTags Tags { get { throw null; } }
         public System.Diagnostics.Tracing.EventTask Task { get { throw null; } }
+        public System.DateTime TimeStamp { get { throw null; } }
         public byte Version { get { throw null; } }
     }
+    public partial class IncrementingEventCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingEventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
+        public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
+        public void Increment(double increment = 1) { }
+    }
+    public partial class IncrementingPollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingPollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> totalValueProvider) { }
+        public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
+    }
     [System.AttributeUsageAttribute(System.AttributeTargets.Method)]
     public sealed partial class NonEventAttribute : System.Attribute
     {
         public NonEventAttribute() { }
     }
+    public partial class PollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public PollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> metricProvider) { }
+    }
 }
 namespace System.Globalization
 {
@@ -21054,6 +21081,30 @@ namespace System.Security.Cryptography
         public static new System.Security.Cryptography.Aes Create() { throw null; }
         public static new System.Security.Cryptography.Aes Create(string algorithmName) { throw null; }
     }
+    public sealed partial class AesCcm : System.IDisposable
+    {
+        public AesCcm(byte[] key) { }
+        public AesCcm(System.ReadOnlySpan<byte> key) { }
+        public static System.Security.Cryptography.KeySizes NonceByteSizes { get { throw null; } }
+        public static System.Security.Cryptography.KeySizes TagByteSizes { get { throw null; } }
+        public void Decrypt(byte[] nonce, byte[] ciphertext, byte[] tag, byte[] plaintext, byte[] associatedData = null) { }
+        public void Decrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> ciphertext, System.ReadOnlySpan<byte> tag, System.Span<byte> plaintext, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+        public void Dispose() { }
+        public void Encrypt(byte[] nonce, byte[] plaintext, byte[] ciphertext, byte[] tag, byte[] associatedData = null) { }
+        public void Encrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> plaintext, System.Span<byte> ciphertext, System.Span<byte> tag, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+    }
+    public sealed partial class AesGcm : System.IDisposable
+    {
+        public AesGcm(byte[] key) { }
+        public AesGcm(System.ReadOnlySpan<byte> key) { }
+        public static System.Security.Cryptography.KeySizes NonceByteSizes { get { throw null; } }
+        public static System.Security.Cryptography.KeySizes TagByteSizes { get { throw null; } }
+        public void Decrypt(byte[] nonce, byte[] ciphertext, byte[] tag, byte[] plaintext, byte[] associatedData = null) { }
+        public void Decrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> ciphertext, System.ReadOnlySpan<byte> tag, System.Span<byte> plaintext, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+        public void Dispose() { }
+        public void Encrypt(byte[] nonce, byte[] plaintext, byte[] ciphertext, byte[] tag, byte[] associatedData = null) { }
+        public void Encrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> plaintext, System.Span<byte> ciphertext, System.Span<byte> tag, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     public abstract partial class AsymmetricAlgorithm : System.IDisposable
     {
diff --git a/profiles/monotouch/Facades/netstandard.cs b/profiles/monotouch/Facades/netstandard.cs
index f435448..faec721 100644
--- a/profiles/monotouch/Facades/netstandard.cs
+++ b/profiles/monotouch/Facades/netstandard.cs
@@ -2,14 +2,14 @@
 // 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("2.0.0.0")]
+[assembly:System.Reflection.AssemblyVersionAttribute("2.1.0.0")]
 [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("netstandard")]
 [assembly:System.Reflection.AssemblyDescriptionAttribute("netstandard")]
-[assembly:System.Reflection.AssemblyFileVersionAttribute("2.0.0.0")]
-[assembly:System.Reflection.AssemblyInformationalVersionAttribute("2.0.0.0")]
+[assembly:System.Reflection.AssemblyFileVersionAttribute("2.1.0.0")]
+[assembly:System.Reflection.AssemblyInformationalVersionAttribute("2.1.0.0")]
 [assembly:System.Reflection.AssemblyProductAttribute("Mono Common Language Infrastructure")]
 [assembly:System.Reflection.AssemblyTitleAttribute("netstandard")]
 [assembly:System.Runtime.CompilerServices.CompilationRelaxationsAttribute(8)]
@@ -506,6 +506,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataColumnChangeEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataColumnCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataReaderExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRelation))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRelationCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRow))]
@@ -706,6 +707,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceSource))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceSwitch))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.DiagnosticCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventActivityOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventChannel))]
@@ -731,7 +733,10 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventTags))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventTask))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventWrittenEventArgs))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.IncrementingEventCounter))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.IncrementingPollingCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.NonEventAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.PollingCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DivideByZeroException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DllNotFoundException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Drawing.Color))]
@@ -1478,6 +1483,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.ResourceWriter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.SatelliteContractVersionAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.UltimateResourceFallbackLocation))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.AmbiguousImplementationException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.AssemblyTargetedPatchBandAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.CompilerServices.AccessedThroughPropertyAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.CompilerServices.AsyncIteratorMethodBuilder))]
@@ -1833,7 +1839,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Claims.ClaimTypes))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Claims.ClaimValueTypes))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.Aes))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesCcm))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesCryptoServiceProvider))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesGcm))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesManaged))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AsnEncodedData))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AsnEncodedDataCollection))]
diff --git a/profiles/monotouch/System.Data.cs b/profiles/monotouch/System.Data.cs
index 444cb32..9977513 100644
--- a/profiles/monotouch/System.Data.cs
+++ b/profiles/monotouch/System.Data.cs
@@ -595,6 +595,38 @@ namespace System.Data
         public DataException(string s) { }
         public DataException(string s, System.Exception innerException) { }
     }
+    public static partial class DataReaderExtensions
+    {
+        public static bool GetBoolean(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static byte GetByte(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetBytes(this System.Data.Common.DbDataReader reader, string name, long dataOffset, byte[] buffer, int bufferOffset, int length) { throw null; }
+        public static char GetChar(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetChars(this System.Data.Common.DbDataReader reader, string name, long dataOffset, char[] buffer, int bufferOffset, int length) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static System.Data.Common.DbDataReader GetData(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static string GetDataTypeName(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.DateTime GetDateTime(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static decimal GetDecimal(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static double GetDouble(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Type GetFieldType(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Threading.Tasks.Task<T> GetFieldValueAsync<T>(this System.Data.Common.DbDataReader reader, string name, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public static T GetFieldValue<T>(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static float GetFloat(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Guid GetGuid(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static short GetInt16(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static int GetInt32(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetInt64(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static System.Type GetProviderSpecificFieldType(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static object GetProviderSpecificValue(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.IO.Stream GetStream(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static string GetString(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.IO.TextReader GetTextReader(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static object GetValue(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static bool IsDBNull(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Threading.Tasks.Task<bool> IsDBNullAsync(this System.Data.Common.DbDataReader reader, string name, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+    }
     [System.ComponentModel.DefaultPropertyAttribute("RelationName")]
     [System.ComponentModel.TypeConverterAttribute("System.Data.RelationshipConverter")]
     public partial class DataRelation
@@ -2138,7 +2170,7 @@ namespace System.Data.Common
         public System.Nullable<int> NumericScale { get { throw null; } protected set { } }
         public string UdtAssemblyQualifiedName { get { throw null; } protected set { } }
     }
-    public abstract partial class DbCommand : System.ComponentModel.Component, System.Data.IDbCommand, System.IDisposable
+    public abstract partial class DbCommand : System.ComponentModel.Component, System.Data.IDbCommand, System.IAsyncDisposable, System.IDisposable
     {
         protected DbCommand() { }
         [System.ComponentModel.DefaultValueAttribute("")]
@@ -2175,6 +2207,7 @@ namespace System.Data.Common
         public abstract void Cancel();
         protected abstract System.Data.Common.DbParameter CreateDbParameter();
         public System.Data.Common.DbParameter CreateParameter() { throw null; }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         protected abstract System.Data.Common.DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior);
         protected virtual System.Threading.Tasks.Task<System.Data.Common.DbDataReader> ExecuteDbDataReaderAsync(System.Data.CommandBehavior behavior, System.Threading.CancellationToken cancellationToken) { throw null; }
         public abstract int ExecuteNonQuery();
@@ -2190,6 +2223,7 @@ namespace System.Data.Common
         public System.Threading.Tasks.Task<object> ExecuteScalarAsync() { throw null; }
         public virtual System.Threading.Tasks.Task<object> ExecuteScalarAsync(System.Threading.CancellationToken cancellationToken) { throw null; }
         public abstract void Prepare();
+        public virtual System.Threading.Tasks.Task PrepareAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         System.Data.IDbDataParameter System.Data.IDbCommand.CreateParameter() { throw null; }
         System.Data.IDataReader System.Data.IDbCommand.ExecuteReader() { throw null; }
         System.Data.IDataReader System.Data.IDbCommand.ExecuteReader(System.Data.CommandBehavior behavior) { throw null; }
@@ -2233,7 +2267,7 @@ namespace System.Data.Common
         protected abstract void SetRowUpdatingHandler(System.Data.Common.DbDataAdapter adapter);
         public virtual string UnquoteIdentifier(string quotedIdentifier) { throw null; }
     }
-    public abstract partial class DbConnection : System.ComponentModel.Component, System.Data.IDbConnection, System.IDisposable
+    public abstract partial class DbConnection : System.ComponentModel.Component, System.Data.IDbConnection, System.IAsyncDisposable, System.IDisposable
     {
         protected DbConnection() { }
         [System.ComponentModel.DefaultValueAttribute("")]
@@ -2251,12 +2285,18 @@ namespace System.Data.Common
         public abstract System.Data.ConnectionState State { get; }
         public virtual event System.Data.StateChangeEventHandler StateChange { add { } remove { } }
         protected abstract System.Data.Common.DbTransaction BeginDbTransaction(System.Data.IsolationLevel isolationLevel);
+        protected virtual System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginDbTransactionAsync(System.Data.IsolationLevel isolationLevel, System.Threading.CancellationToken cancellationToken) { throw null; }
         public System.Data.Common.DbTransaction BeginTransaction() { throw null; }
         public System.Data.Common.DbTransaction BeginTransaction(System.Data.IsolationLevel isolationLevel) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginTransactionAsync(System.Data.IsolationLevel isolationLevel, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginTransactionAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public abstract void ChangeDatabase(string databaseName);
+        public virtual System.Threading.Tasks.Task ChangeDatabaseAsync(string databaseName, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public abstract void Close();
+        public virtual System.Threading.Tasks.Task CloseAsync() { throw null; }
         public System.Data.Common.DbCommand CreateCommand() { throw null; }
         protected abstract System.Data.Common.DbCommand CreateDbCommand();
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public virtual void EnlistTransaction(System.Transactions.Transaction transaction) { }
         public virtual System.Data.DataTable GetSchema() { throw null; }
         public virtual System.Data.DataTable GetSchema(string collectionName) { throw null; }
@@ -2422,7 +2462,7 @@ namespace System.Data.Common
         [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
         public bool ShouldSerializeKeyRestrictions() { throw null; }
     }
-    public abstract partial class DbDataReader : System.MarshalByRefObject, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable
+    public abstract partial class DbDataReader : System.MarshalByRefObject, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IAsyncDisposable, System.IDisposable
     {
         protected DbDataReader() { }
         public abstract int Depth { get; }
@@ -2434,9 +2474,11 @@ namespace System.Data.Common
         public abstract int RecordsAffected { get; }
         public virtual int VisibleFieldCount { get { throw null; } }
         public virtual void Close() { }
+        public virtual System.Threading.Tasks.Task CloseAsync() { throw null; }
         [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public abstract bool GetBoolean(int ordinal);
         public abstract byte GetByte(int ordinal);
         public abstract long GetBytes(int ordinal, long dataOffset, byte[] buffer, int bufferOffset, int length);
@@ -2707,6 +2749,8 @@ namespace System.Data.Common
     public abstract partial class DbProviderFactory
     {
         protected DbProviderFactory() { }
+        public virtual bool CanCreateCommandBuilder { get { throw null; } }
+        public virtual bool CanCreateDataAdapter { get { throw null; } }
         public virtual bool CanCreateDataSourceEnumerator { get { throw null; } }
         public virtual System.Data.Common.DbCommand CreateCommand() { throw null; }
         public virtual System.Data.Common.DbCommandBuilder CreateCommandBuilder() { throw null; }
@@ -2724,7 +2768,7 @@ namespace System.Data.Common
         public DbProviderSpecificTypePropertyAttribute(bool isProviderSpecificTypeProperty) { }
         public bool IsProviderSpecificTypeProperty { get { throw null; } }
     }
-    public abstract partial class DbTransaction : System.MarshalByRefObject, System.Data.IDbTransaction, System.IDisposable
+    public abstract partial class DbTransaction : System.MarshalByRefObject, System.Data.IDbTransaction, System.IAsyncDisposable, System.IDisposable
     {
         protected DbTransaction() { }
         public System.Data.Common.DbConnection Connection { get { throw null; } }
@@ -2732,9 +2776,12 @@ namespace System.Data.Common
         public abstract System.Data.IsolationLevel IsolationLevel { get; }
         System.Data.IDbConnection System.Data.IDbTransaction.Connection { get { throw null; } }
         public abstract void Commit();
+        public virtual System.Threading.Tasks.Task CommitAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public abstract void Rollback();
+        public virtual System.Threading.Tasks.Task RollbackAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
     }
     public enum GroupByBehavior
     {
diff --git a/profiles/monotouch/System.Net.Http.cs b/profiles/monotouch/System.Net.Http.cs
index e8b2a04..b56a900 100644
--- a/profiles/monotouch/System.Net.Http.cs
+++ b/profiles/monotouch/System.Net.Http.cs
@@ -214,6 +214,7 @@ namespace System.Net.Http
         public string ReasonPhrase { get { throw null; } set { } }
         public System.Net.Http.HttpRequestMessage RequestMessage { get { throw null; } set { } }
         public System.Net.HttpStatusCode StatusCode { get { throw null; } set { } }
+        public System.Net.Http.Headers.HttpResponseHeaders TrailingHeaders { get { throw null; } }
         public System.Version Version { get { throw null; } set { } }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
diff --git a/profiles/monotouch/mscorlib.cs b/profiles/monotouch/mscorlib.cs
index fdc367b..0a75533 100644
--- a/profiles/monotouch/mscorlib.cs
+++ b/profiles/monotouch/mscorlib.cs
@@ -7875,6 +7875,16 @@ namespace System.Diagnostics.SymbolStore
 }
 namespace System.Diagnostics.Tracing
 {
+    public abstract partial class DiagnosticCounter : System.IDisposable
+    {
+        internal DiagnosticCounter() { }
+        public string DisplayName { get { throw null; } set { } }
+        public string DisplayUnits { get { throw null; } set { } }
+        public System.Diagnostics.Tracing.EventSource EventSource { get { throw null; } }
+        public string Name { get { throw null; } }
+        public void AddMetadata(string key, string value) { }
+        public void Dispose() { }
+    }
     [System.FlagsAttribute]
     public enum EventActivityOptions
     {
@@ -7921,10 +7931,10 @@ namespace System.Diagnostics.Tracing
         public bool DisableEvent(int eventId) { throw null; }
         public bool EnableEvent(int eventId) { throw null; }
     }
-    public partial class EventCounter : System.IDisposable
+    public partial class EventCounter : System.Diagnostics.Tracing.DiagnosticCounter
     {
         public EventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
-        public void Dispose() { }
+        public void WriteMetric(double value) { }
         public void WriteMetric(float value) { }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Struct, Inherited=false)]
@@ -8152,18 +8162,35 @@ namespace System.Diagnostics.Tracing
         public System.Diagnostics.Tracing.EventLevel Level { get { throw null; } }
         public string Message { get { throw null; } }
         public System.Diagnostics.Tracing.EventOpcode Opcode { get { throw null; } }
+        public long OSThreadId { get { throw null; } }
         public System.Collections.ObjectModel.ReadOnlyCollection<object> Payload { get { throw null; } }
         public System.Collections.ObjectModel.ReadOnlyCollection<string> PayloadNames { get { throw null; } }
         public System.Guid RelatedActivityId { get { throw null; } }
         public System.Diagnostics.Tracing.EventTags Tags { get { throw null; } }
         public System.Diagnostics.Tracing.EventTask Task { get { throw null; } }
+        public System.DateTime TimeStamp { get { throw null; } }
         public byte Version { get { throw null; } }
     }
+    public partial class IncrementingEventCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingEventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
+        public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
+        public void Increment(double increment = 1) { }
+    }
+    public partial class IncrementingPollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingPollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> totalValueProvider) { }
+        public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
+    }
     [System.AttributeUsageAttribute(System.AttributeTargets.Method)]
     public sealed partial class NonEventAttribute : System.Attribute
     {
         public NonEventAttribute() { }
     }
+    public partial class PollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public PollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> metricProvider) { }
+    }
 }
 namespace System.Globalization
 {
@@ -20444,6 +20471,30 @@ namespace System.Security.Cryptography
         public static new System.Security.Cryptography.Aes Create() { throw null; }
         public static new System.Security.Cryptography.Aes Create(string algorithmName) { throw null; }
     }
+    public sealed partial class AesCcm : System.IDisposable
+    {
+        public AesCcm(byte[] key) { }
+        public AesCcm(System.ReadOnlySpan<byte> key) { }
+        public static System.Security.Cryptography.KeySizes NonceByteSizes { get { throw null; } }
+        public static System.Security.Cryptography.KeySizes TagByteSizes { get { throw null; } }
+        public void Decrypt(byte[] nonce, byte[] ciphertext, byte[] tag, byte[] plaintext, byte[] associatedData = null) { }
+        public void Decrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> ciphertext, System.ReadOnlySpan<byte> tag, System.Span<byte> plaintext, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+        public void Dispose() { }
+        public void Encrypt(byte[] nonce, byte[] plaintext, byte[] ciphertext, byte[] tag, byte[] associatedData = null) { }
+        public void Encrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> plaintext, System.Span<byte> ciphertext, System.Span<byte> tag, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+    }
+    public sealed partial class AesGcm : System.IDisposable
+    {
+        public AesGcm(byte[] key) { }
+        public AesGcm(System.ReadOnlySpan<byte> key) { }
+        public static System.Security.Cryptography.KeySizes NonceByteSizes { get { throw null; } }
+        public static System.Security.Cryptography.KeySizes TagByteSizes { get { throw null; } }
+        public void Decrypt(byte[] nonce, byte[] ciphertext, byte[] tag, byte[] plaintext, byte[] associatedData = null) { }
+        public void Decrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> ciphertext, System.ReadOnlySpan<byte> tag, System.Span<byte> plaintext, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+        public void Dispose() { }
+        public void Encrypt(byte[] nonce, byte[] plaintext, byte[] ciphertext, byte[] tag, byte[] associatedData = null) { }
+        public void Encrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> plaintext, System.Span<byte> ciphertext, System.Span<byte> tag, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     public abstract partial class AsymmetricAlgorithm : System.IDisposable
     {
diff --git a/profiles/net_4_x/Facades/netstandard.cs b/profiles/net_4_x/Facades/netstandard.cs
index f435448..faec721 100644
--- a/profiles/net_4_x/Facades/netstandard.cs
+++ b/profiles/net_4_x/Facades/netstandard.cs
@@ -2,14 +2,14 @@
 // 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("2.0.0.0")]
+[assembly:System.Reflection.AssemblyVersionAttribute("2.1.0.0")]
 [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("netstandard")]
 [assembly:System.Reflection.AssemblyDescriptionAttribute("netstandard")]
-[assembly:System.Reflection.AssemblyFileVersionAttribute("2.0.0.0")]
-[assembly:System.Reflection.AssemblyInformationalVersionAttribute("2.0.0.0")]
+[assembly:System.Reflection.AssemblyFileVersionAttribute("2.1.0.0")]
+[assembly:System.Reflection.AssemblyInformationalVersionAttribute("2.1.0.0")]
 [assembly:System.Reflection.AssemblyProductAttribute("Mono Common Language Infrastructure")]
 [assembly:System.Reflection.AssemblyTitleAttribute("netstandard")]
 [assembly:System.Runtime.CompilerServices.CompilationRelaxationsAttribute(8)]
@@ -506,6 +506,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataColumnChangeEventHandler))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataColumnCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataException))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataReaderExtensions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRelation))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRelationCollection))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Data.DataRow))]
@@ -706,6 +707,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceSource))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.TraceSwitch))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.DiagnosticCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventActivityOptions))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventChannel))]
@@ -731,7 +733,10 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventTags))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventTask))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.EventWrittenEventArgs))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.IncrementingEventCounter))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.IncrementingPollingCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.NonEventAttribute))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Diagnostics.Tracing.PollingCounter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DivideByZeroException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.DllNotFoundException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Drawing.Color))]
@@ -1478,6 +1483,7 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.ResourceWriter))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.SatelliteContractVersionAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Resources.UltimateResourceFallbackLocation))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.AmbiguousImplementationException))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.AssemblyTargetedPatchBandAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.CompilerServices.AccessedThroughPropertyAttribute))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Runtime.CompilerServices.AsyncIteratorMethodBuilder))]
@@ -1833,7 +1839,9 @@
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Claims.ClaimTypes))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Claims.ClaimValueTypes))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.Aes))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesCcm))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesCryptoServiceProvider))]
+[assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesGcm))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AesManaged))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AsnEncodedData))]
 [assembly:System.Runtime.CompilerServices.TypeForwardedToAttribute(typeof(System.Security.Cryptography.AsnEncodedDataCollection))]
diff --git a/profiles/net_4_x/System.Data.cs b/profiles/net_4_x/System.Data.cs
index 2a636e5..65cac58 100644
--- a/profiles/net_4_x/System.Data.cs
+++ b/profiles/net_4_x/System.Data.cs
@@ -615,6 +615,38 @@ namespace System.Data
         public DataException(string s) { }
         public DataException(string s, System.Exception innerException) { }
     }
+    public static partial class DataReaderExtensions
+    {
+        public static bool GetBoolean(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static byte GetByte(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetBytes(this System.Data.Common.DbDataReader reader, string name, long dataOffset, byte[] buffer, int bufferOffset, int length) { throw null; }
+        public static char GetChar(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetChars(this System.Data.Common.DbDataReader reader, string name, long dataOffset, char[] buffer, int bufferOffset, int length) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static System.Data.Common.DbDataReader GetData(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static string GetDataTypeName(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.DateTime GetDateTime(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static decimal GetDecimal(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static double GetDouble(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Type GetFieldType(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Threading.Tasks.Task<T> GetFieldValueAsync<T>(this System.Data.Common.DbDataReader reader, string name, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public static T GetFieldValue<T>(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static float GetFloat(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Guid GetGuid(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static short GetInt16(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static int GetInt32(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static long GetInt64(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static System.Type GetProviderSpecificFieldType(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
+        public static object GetProviderSpecificValue(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.IO.Stream GetStream(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static string GetString(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.IO.TextReader GetTextReader(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static object GetValue(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static bool IsDBNull(this System.Data.Common.DbDataReader reader, string name) { throw null; }
+        public static System.Threading.Tasks.Task<bool> IsDBNullAsync(this System.Data.Common.DbDataReader reader, string name, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+    }
     [System.ComponentModel.DefaultPropertyAttribute("RelationName")]
     [System.ComponentModel.TypeConverterAttribute("System.Data.RelationshipConverter")]
     public partial class DataRelation
@@ -2172,7 +2204,7 @@ namespace System.Data.Common
         public System.Nullable<int> NumericScale { get { throw null; } protected set { } }
         public string UdtAssemblyQualifiedName { get { throw null; } protected set { } }
     }
-    public abstract partial class DbCommand : System.ComponentModel.Component, System.Data.IDbCommand, System.IDisposable
+    public abstract partial class DbCommand : System.ComponentModel.Component, System.Data.IDbCommand, System.IAsyncDisposable, System.IDisposable
     {
         protected DbCommand() { }
         [System.ComponentModel.DefaultValueAttribute("")]
@@ -2209,6 +2241,7 @@ namespace System.Data.Common
         public abstract void Cancel();
         protected abstract System.Data.Common.DbParameter CreateDbParameter();
         public System.Data.Common.DbParameter CreateParameter() { throw null; }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         protected abstract System.Data.Common.DbDataReader ExecuteDbDataReader(System.Data.CommandBehavior behavior);
         protected virtual System.Threading.Tasks.Task<System.Data.Common.DbDataReader> ExecuteDbDataReaderAsync(System.Data.CommandBehavior behavior, System.Threading.CancellationToken cancellationToken) { throw null; }
         public abstract int ExecuteNonQuery();
@@ -2224,6 +2257,7 @@ namespace System.Data.Common
         public System.Threading.Tasks.Task<object> ExecuteScalarAsync() { throw null; }
         public virtual System.Threading.Tasks.Task<object> ExecuteScalarAsync(System.Threading.CancellationToken cancellationToken) { throw null; }
         public abstract void Prepare();
+        public virtual System.Threading.Tasks.Task PrepareAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         System.Data.IDbDataParameter System.Data.IDbCommand.CreateParameter() { throw null; }
         System.Data.IDataReader System.Data.IDbCommand.ExecuteReader() { throw null; }
         System.Data.IDataReader System.Data.IDbCommand.ExecuteReader(System.Data.CommandBehavior behavior) { throw null; }
@@ -2267,7 +2301,7 @@ namespace System.Data.Common
         protected abstract void SetRowUpdatingHandler(System.Data.Common.DbDataAdapter adapter);
         public virtual string UnquoteIdentifier(string quotedIdentifier) { throw null; }
     }
-    public abstract partial class DbConnection : System.ComponentModel.Component, System.Data.IDbConnection, System.IDisposable
+    public abstract partial class DbConnection : System.ComponentModel.Component, System.Data.IDbConnection, System.IAsyncDisposable, System.IDisposable
     {
         protected DbConnection() { }
         [System.ComponentModel.DefaultValueAttribute("")]
@@ -2285,12 +2319,18 @@ namespace System.Data.Common
         public abstract System.Data.ConnectionState State { get; }
         public virtual event System.Data.StateChangeEventHandler StateChange { add { } remove { } }
         protected abstract System.Data.Common.DbTransaction BeginDbTransaction(System.Data.IsolationLevel isolationLevel);
+        protected virtual System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginDbTransactionAsync(System.Data.IsolationLevel isolationLevel, System.Threading.CancellationToken cancellationToken) { throw null; }
         public System.Data.Common.DbTransaction BeginTransaction() { throw null; }
         public System.Data.Common.DbTransaction BeginTransaction(System.Data.IsolationLevel isolationLevel) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginTransactionAsync(System.Data.IsolationLevel isolationLevel, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Data.Common.DbTransaction> BeginTransactionAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public abstract void ChangeDatabase(string databaseName);
+        public virtual System.Threading.Tasks.Task ChangeDatabaseAsync(string databaseName, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public abstract void Close();
+        public virtual System.Threading.Tasks.Task CloseAsync() { throw null; }
         public System.Data.Common.DbCommand CreateCommand() { throw null; }
         protected abstract System.Data.Common.DbCommand CreateDbCommand();
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public virtual void EnlistTransaction(System.Transactions.Transaction transaction) { }
         public virtual System.Data.DataTable GetSchema() { throw null; }
         public virtual System.Data.DataTable GetSchema(string collectionName) { throw null; }
@@ -2456,7 +2496,7 @@ namespace System.Data.Common
         [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
         public bool ShouldSerializeKeyRestrictions() { throw null; }
     }
-    public abstract partial class DbDataReader : System.MarshalByRefObject, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IDisposable
+    public abstract partial class DbDataReader : System.MarshalByRefObject, System.Collections.IEnumerable, System.Data.IDataReader, System.Data.IDataRecord, System.IAsyncDisposable, System.IDisposable
     {
         protected DbDataReader() { }
         public abstract int Depth { get; }
@@ -2468,9 +2508,11 @@ namespace System.Data.Common
         public abstract int RecordsAffected { get; }
         public virtual int VisibleFieldCount { get { throw null; } }
         public virtual void Close() { }
+        public virtual System.Threading.Tasks.Task CloseAsync() { throw null; }
         [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public abstract bool GetBoolean(int ordinal);
         public abstract byte GetByte(int ordinal);
         public abstract long GetBytes(int ordinal, long dataOffset, byte[] buffer, int bufferOffset, int length);
@@ -2752,6 +2794,8 @@ namespace System.Data.Common
     public abstract partial class DbProviderFactory
     {
         protected DbProviderFactory() { }
+        public virtual bool CanCreateCommandBuilder { get { throw null; } }
+        public virtual bool CanCreateDataAdapter { get { throw null; } }
         public virtual bool CanCreateDataSourceEnumerator { get { throw null; } }
         public virtual System.Data.Common.DbCommand CreateCommand() { throw null; }
         public virtual System.Data.Common.DbCommandBuilder CreateCommandBuilder() { throw null; }
@@ -2769,7 +2813,7 @@ namespace System.Data.Common
         public DbProviderSpecificTypePropertyAttribute(bool isProviderSpecificTypeProperty) { }
         public bool IsProviderSpecificTypeProperty { get { throw null; } }
     }
-    public abstract partial class DbTransaction : System.MarshalByRefObject, System.Data.IDbTransaction, System.IDisposable
+    public abstract partial class DbTransaction : System.MarshalByRefObject, System.Data.IDbTransaction, System.IAsyncDisposable, System.IDisposable
     {
         protected DbTransaction() { }
         public System.Data.Common.DbConnection Connection { get { throw null; } }
@@ -2777,9 +2821,12 @@ namespace System.Data.Common
         public abstract System.Data.IsolationLevel IsolationLevel { get; }
         System.Data.IDbConnection System.Data.IDbTransaction.Connection { get { throw null; } }
         public abstract void Commit();
+        public virtual System.Threading.Tasks.Task CommitAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
+        public virtual System.Threading.Tasks.ValueTask DisposeAsync() { throw null; }
         public abstract void Rollback();
+        public virtual System.Threading.Tasks.Task RollbackAsync(System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
     }
     public enum GroupByBehavior
     {
diff --git a/profiles/net_4_x/System.Net.Http.cs b/profiles/net_4_x/System.Net.Http.cs
index e9d5821..5635b7a 100644
--- a/profiles/net_4_x/System.Net.Http.cs
+++ b/profiles/net_4_x/System.Net.Http.cs
@@ -211,6 +211,7 @@ namespace System.Net.Http
         public string ReasonPhrase { get { throw null; } set { } }
         public System.Net.Http.HttpRequestMessage RequestMessage { get { throw null; } set { } }
         public System.Net.HttpStatusCode StatusCode { get { throw null; } set { } }
+        public System.Net.Http.Headers.HttpResponseHeaders TrailingHeaders { get { throw null; } }
         public System.Version Version { get { throw null; } set { } }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
diff --git a/profiles/net_4_x/mscorlib.cs b/profiles/net_4_x/mscorlib.cs
index eac82fb..2476fc6 100644
--- a/profiles/net_4_x/mscorlib.cs
+++ b/profiles/net_4_x/mscorlib.cs
@@ -7902,6 +7902,16 @@ namespace System.Diagnostics.SymbolStore
 }
 namespace System.Diagnostics.Tracing
 {
+    public abstract partial class DiagnosticCounter : System.IDisposable
+    {
+        internal DiagnosticCounter() { }
+        public string DisplayName { get { throw null; } set { } }
+        public string DisplayUnits { get { throw null; } set { } }
+        public System.Diagnostics.Tracing.EventSource EventSource { get { throw null; } }
+        public string Name { get { throw null; } }
+        public void AddMetadata(string key, string value) { }
+        public void Dispose() { }
+    }
     [System.FlagsAttribute]
     public enum EventActivityOptions
     {
@@ -7948,10 +7958,10 @@ namespace System.Diagnostics.Tracing
         public bool DisableEvent(int eventId) { throw null; }
         public bool EnableEvent(int eventId) { throw null; }
     }
-    public partial class EventCounter : System.IDisposable
+    public partial class EventCounter : System.Diagnostics.Tracing.DiagnosticCounter
     {
         public EventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
-        public void Dispose() { }
+        public void WriteMetric(double value) { }
         public void WriteMetric(float value) { }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Class | System.AttributeTargets.Struct, Inherited=false)]
@@ -8179,18 +8189,35 @@ namespace System.Diagnostics.Tracing
         public System.Diagnostics.Tracing.EventLevel Level { get { throw null; } }
         public string Message { get { throw null; } }
         public System.Diagnostics.Tracing.EventOpcode Opcode { get { throw null; } }
+        public long OSThreadId { get { throw null; } }
         public System.Collections.ObjectModel.ReadOnlyCollection<object> Payload { get { throw null; } }
         public System.Collections.ObjectModel.ReadOnlyCollection<string> PayloadNames { get { throw null; } }
         public System.Guid RelatedActivityId { get { throw null; } }
         public System.Diagnostics.Tracing.EventTags Tags { get { throw null; } }
         public System.Diagnostics.Tracing.EventTask Task { get { throw null; } }
+        public System.DateTime TimeStamp { get { throw null; } }
         public byte Version { get { throw null; } }
     }
+    public partial class IncrementingEventCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingEventCounter(string name, System.Diagnostics.Tracing.EventSource eventSource) { }
+        public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
+        public void Increment(double increment = 1) { }
+    }
+    public partial class IncrementingPollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public IncrementingPollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> totalValueProvider) { }
+        public System.TimeSpan DisplayRateTimeScale { get { throw null; } set { } }
+    }
     [System.AttributeUsageAttribute(System.AttributeTargets.Method)]
     public sealed partial class NonEventAttribute : System.Attribute
     {
         public NonEventAttribute() { }
     }
+    public partial class PollingCounter : System.Diagnostics.Tracing.DiagnosticCounter
+    {
+        public PollingCounter(string name, System.Diagnostics.Tracing.EventSource eventSource, System.Func<double> metricProvider) { }
+    }
 }
 namespace System.Globalization
 {
@@ -21201,6 +21228,30 @@ namespace System.Security.Cryptography
         public static new System.Security.Cryptography.Aes Create() { throw null; }
         public static new System.Security.Cryptography.Aes Create(string algorithmName) { throw null; }
     }
+    public sealed partial class AesCcm : System.IDisposable
+    {
+        public AesCcm(byte[] key) { }
+        public AesCcm(System.ReadOnlySpan<byte> key) { }
+        public static System.Security.Cryptography.KeySizes NonceByteSizes { get { throw null; } }
+        public static System.Security.Cryptography.KeySizes TagByteSizes { get { throw null; } }
+        public void Decrypt(byte[] nonce, byte[] ciphertext, byte[] tag, byte[] plaintext, byte[] associatedData = null) { }
+        public void Decrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> ciphertext, System.ReadOnlySpan<byte> tag, System.Span<byte> plaintext, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+        public void Dispose() { }
+        public void Encrypt(byte[] nonce, byte[] plaintext, byte[] ciphertext, byte[] tag, byte[] associatedData = null) { }
+        public void Encrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> plaintext, System.Span<byte> ciphertext, System.Span<byte> tag, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+    }
+    public sealed partial class AesGcm : System.IDisposable
+    {
+        public AesGcm(byte[] key) { }
+        public AesGcm(System.ReadOnlySpan<byte> key) { }
+        public static System.Security.Cryptography.KeySizes NonceByteSizes { get { throw null; } }
+        public static System.Security.Cryptography.KeySizes TagByteSizes { get { throw null; } }
+        public void Decrypt(byte[] nonce, byte[] ciphertext, byte[] tag, byte[] plaintext, byte[] associatedData = null) { }
+        public void Decrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> ciphertext, System.ReadOnlySpan<byte> tag, System.Span<byte> plaintext, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+        public void Dispose() { }
+        public void Encrypt(byte[] nonce, byte[] plaintext, byte[] ciphertext, byte[] tag, byte[] associatedData = null) { }
+        public void Encrypt(System.ReadOnlySpan<byte> nonce, System.ReadOnlySpan<byte> plaintext, System.Span<byte> ciphertext, System.Span<byte> tag, System.ReadOnlySpan<byte> associatedData = default(System.ReadOnlySpan<byte>)) { }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     public abstract partial class AsymmetricAlgorithm : System.IDisposable
     {