Apply changes from https://github.com/mono/mono/pull/5327 to API snapshot

10 files changed, 212 insertions, 4 deletions

diff --git a/profiles/monodroid/System.Numerics.cs b/profiles/monodroid/System.Numerics.cs
index 50fdcbb..9a5c30d 100644
--- a/profiles/monodroid/System.Numerics.cs
+++ b/profiles/monodroid/System.Numerics.cs
@@ -32,6 +32,7 @@ namespace System.Numerics
         public BigInteger(double value) { throw null;}
         public BigInteger(int value) { throw null;}
         public BigInteger(long value) { throw null;}
+        public BigInteger(System.ReadOnlySpan<byte> value) { throw null;}
         public BigInteger(float value) { throw null;}
         [System.CLSCompliantAttribute(false)]
         public BigInteger(uint value) { throw null;}
@@ -60,6 +61,7 @@ namespace System.Numerics
         public override bool Equals(object obj) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public bool Equals(ulong other) { throw null; }
+        public int GetByteCount() { throw null; }
         public override int GetHashCode() { throw null; }
         public static System.Numerics.BigInteger GreatestCommonDivisor(System.Numerics.BigInteger left, System.Numerics.BigInteger right) { throw null; }
         public static double Log(System.Numerics.BigInteger value) { throw null; }
@@ -157,6 +159,7 @@ namespace System.Numerics
         public static System.Numerics.BigInteger operator -(System.Numerics.BigInteger left, System.Numerics.BigInteger right) { throw null; }
         public static System.Numerics.BigInteger operator -(System.Numerics.BigInteger value) { throw null; }
         public static System.Numerics.BigInteger operator +(System.Numerics.BigInteger value) { throw null; }
+        public static System.Numerics.BigInteger Parse(System.ReadOnlySpan<char> value, System.Globalization.NumberStyles style=(System.Globalization.NumberStyles)(7), System.IFormatProvider provider=null) { throw null; }
         public static System.Numerics.BigInteger Parse(string value) { throw null; }
         public static System.Numerics.BigInteger Parse(string value, System.Globalization.NumberStyles style) { throw null; }
         public static System.Numerics.BigInteger Parse(string value, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -169,8 +172,10 @@ namespace System.Numerics
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> value, out System.Numerics.BigInteger result, System.Globalization.NumberStyles style=(System.Globalization.NumberStyles)(7), System.IFormatProvider provider=null) { result = default(System.Numerics.BigInteger); throw null; }
         public static bool TryParse(string value, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Numerics.BigInteger result) { result = default(System.Numerics.BigInteger); throw null; }
         public static bool TryParse(string value, out System.Numerics.BigInteger result) { result = default(System.Numerics.BigInteger); throw null; }
+        public bool TryWriteBytes(System.Span<byte> destination, out int bytesWritten) { bytesWritten = default(int); throw null; }
     }
     [System.SerializableAttribute]
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
diff --git a/profiles/monodroid/System.cs b/profiles/monodroid/System.cs
index 88bdb09..dbfb8c3 100644
--- a/profiles/monodroid/System.cs
+++ b/profiles/monodroid/System.cs
@@ -5317,6 +5317,7 @@ namespace System.IO.Compression
         public override long Position { get { throw null; } set { } }
         public override System.IAsyncResult BeginRead(byte[] array, int offset, int count, System.AsyncCallback asyncCallback, object asyncState) { throw null; }
         public override System.IAsyncResult BeginWrite(byte[] array, int offset, int count, System.AsyncCallback asyncCallback, object asyncState) { throw null; }
+        public override void CopyTo(System.IO.Stream destination, int bufferSize) { }
         public override System.Threading.Tasks.Task CopyToAsync(System.IO.Stream destination, int bufferSize, System.Threading.CancellationToken cancellationToken) { throw null; }
         protected override void Dispose(bool disposing) { }
         public override int EndRead(System.IAsyncResult asyncResult) { throw null; }
@@ -5324,11 +5325,13 @@ namespace System.IO.Compression
         public override void Flush() { }
         public override System.Threading.Tasks.Task FlushAsync(System.Threading.CancellationToken cancellationToken) { throw null; }
         public override int Read(byte[] array, int offset, int count) { throw null; }
+        public override int Read(System.Span<byte> destination) { throw null; }
         public override System.Threading.Tasks.Task<int> ReadAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
         public override int ReadByte() { throw null; }
         public override long Seek(long offset, System.IO.SeekOrigin origin) { throw null; }
         public override void SetLength(long value) { }
         public override void Write(byte[] array, int offset, int count) { }
+        public override void Write(System.ReadOnlySpan<byte> source) { }
         public override System.Threading.Tasks.Task WriteAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
     }
 }
diff --git a/profiles/monodroid/mscorlib.cs b/profiles/monodroid/mscorlib.cs
index fb09b52..7fcd5ca 100644
--- a/profiles/monodroid/mscorlib.cs
+++ b/profiles/monodroid/mscorlib.cs
@@ -2496,6 +2496,7 @@ namespace System
         [System.Security.SecuritySafeCriticalAttribute]
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static bool IsFinite(System.Double d) { throw null; }
         [System.Security.SecuritySafeCriticalAttribute]
         public static bool IsInfinity(System.Double d) { throw null; }
         [System.Runtime.ConstrainedExecution.ReliabilityContractAttribute((System.Runtime.ConstrainedExecution.Consistency)(3), (System.Runtime.ConstrainedExecution.Cer)(2))]
@@ -3842,6 +3843,32 @@ namespace System
         public RankException(string message) { }
         public RankException(string message, System.Exception innerException) { }
     }
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public partial struct ReadOnlySpan<T>
+    {
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public unsafe ReadOnlySpan(void* pointer, int length) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ReadOnlySpan(T[] array) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ReadOnlySpan(T[] array, int start, int length) { throw null;}
+        public static System.ReadOnlySpan<T> Empty { get { throw null; } }
+        public bool IsEmpty { get { throw null; } }
+        public T this[int index] { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        public int Length { get { throw null; } }
+        public void CopyTo(System.Span<T> destination) { }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static System.ReadOnlySpan<T> DangerousCreate(object obj, ref T objectData, int length) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ref T DangerousGetPinnableReference() { throw null; }
+        [System.ObsoleteAttribute("Equals() on Span will always throw an exception. Use == instead.")]
+        public override bool Equals(object obj) { throw null; }
+        [System.ObsoleteAttribute("GetHashCode() on Span will always throw an exception.")]
+        public override int GetHashCode() { throw null; }
+        public static bool operator ==(System.ReadOnlySpan<T> left, System.ReadOnlySpan<T> right) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (System.ArraySegment<T> arraySegment) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (T[] array) { throw null; }
+        public static bool operator !=(System.ReadOnlySpan<T> left, System.ReadOnlySpan<T> right) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.ReadOnlySpan<T> Slice(int start) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.ReadOnlySpan<T> Slice(int start, int length) { throw null; }
+        public T[] ToArray() { throw null; }
+        public bool TryCopyTo(System.Span<T> destination) { throw null; }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     public partial class ResolveEventArgs : System.EventArgs
     {
@@ -3982,6 +4009,7 @@ namespace System
         [System.Security.SecuritySafeCriticalAttribute]
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static bool IsFinite(System.Single f) { throw null; }
         [System.Security.SecuritySafeCriticalAttribute]
         public static bool IsInfinity(System.Single f) { throw null; }
         [System.Runtime.ConstrainedExecution.ReliabilityContractAttribute((System.Runtime.ConstrainedExecution.Consistency)(3), (System.Runtime.ConstrainedExecution.Cer)(2))]
@@ -4027,6 +4055,37 @@ namespace System
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Single result) { result = default(float); throw null; }
         public static bool TryParse(string s, out System.Single result) { result = default(float); throw null; }
     }
+    [System.Diagnostics.DebuggerDisplayAttribute("Length = {Length}")]
+    [System.Diagnostics.DebuggerTypeProxyAttribute("System.SpanDebugView<T>")]
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public partial struct Span<T>
+    {
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public unsafe Span(void* pointer, int length) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public Span(T[] array) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public Span(T[] array, int start, int length) { throw null;}
+        public static System.Span<T> Empty { get { throw null; } }
+        public bool IsEmpty { get { throw null; } }
+        public ref T this[int index] { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        public int Length { get { throw null; } }
+        public void Clear() { }
+        public void CopyTo(System.Span<T> destination) { }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static System.Span<T> DangerousCreate(object obj, ref T objectData, int length) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ref T DangerousGetPinnableReference() { throw null; }
+        [System.ObsoleteAttribute("Equals() on Span will always throw an exception. Use == instead.")]
+        public override bool Equals(object obj) { throw null; }
+        public void Fill(T value) { }
+        [System.ObsoleteAttribute("GetHashCode() on Span will always throw an exception.")]
+        public override int GetHashCode() { throw null; }
+        public static bool operator ==(System.Span<T> left, System.Span<T> right) { throw null; }
+        public static implicit operator System.Span<T> (System.ArraySegment<T> arraySegment) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (System.Span<T> span) { throw null; }
+        public static implicit operator System.Span<T> (T[] array) { throw null; }
+        public static bool operator !=(System.Span<T> left, System.Span<T> right) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.Span<T> Slice(int start) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.Span<T> Slice(int start, int length) { throw null; }
+        public T[] ToArray() { throw null; }
+        public bool TryCopyTo(System.Span<T> destination) { throw null; }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     [System.SerializableAttribute]
     public sealed partial class StackOverflowException : System.SystemException
@@ -9243,7 +9302,7 @@ namespace System.IO
         public virtual System.IAsyncResult BeginWrite(byte[] buffer, int offset, int count, System.AsyncCallback callback, object state) { throw null; }
         public virtual void Close() { }
         public void CopyTo(System.IO.Stream destination) { }
-        public void CopyTo(System.IO.Stream destination, int bufferSize) { }
+        public virtual void CopyTo(System.IO.Stream destination, int bufferSize) { }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task CopyToAsync(System.IO.Stream destination) { throw null; }
@@ -9269,6 +9328,7 @@ namespace System.IO
         [System.ObsoleteAttribute("Do not call or override this method.")]
         protected virtual void ObjectInvariant() { }
         public abstract int Read([System.Runtime.InteropServices.In][System.Runtime.InteropServices.Out]byte[] buffer, int offset, int count);
+        public virtual int Read(System.Span<byte> destination) { throw null; }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task<int> ReadAsync(byte[] buffer, int offset, int count) { throw null; }
@@ -9281,6 +9341,7 @@ namespace System.IO
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Synchronization=true)]
         public static System.IO.Stream Synchronized(System.IO.Stream stream) { throw null; }
         public abstract void Write(byte[] buffer, int offset, int count);
+        public virtual void Write(System.ReadOnlySpan<byte> source) { }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task WriteAsync(byte[] buffer, int offset, int count) { throw null; }
diff --git a/profiles/monotouch/System.Numerics.cs b/profiles/monotouch/System.Numerics.cs
index 50fdcbb..9a5c30d 100644
--- a/profiles/monotouch/System.Numerics.cs
+++ b/profiles/monotouch/System.Numerics.cs
@@ -32,6 +32,7 @@ namespace System.Numerics
         public BigInteger(double value) { throw null;}
         public BigInteger(int value) { throw null;}
         public BigInteger(long value) { throw null;}
+        public BigInteger(System.ReadOnlySpan<byte> value) { throw null;}
         public BigInteger(float value) { throw null;}
         [System.CLSCompliantAttribute(false)]
         public BigInteger(uint value) { throw null;}
@@ -60,6 +61,7 @@ namespace System.Numerics
         public override bool Equals(object obj) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public bool Equals(ulong other) { throw null; }
+        public int GetByteCount() { throw null; }
         public override int GetHashCode() { throw null; }
         public static System.Numerics.BigInteger GreatestCommonDivisor(System.Numerics.BigInteger left, System.Numerics.BigInteger right) { throw null; }
         public static double Log(System.Numerics.BigInteger value) { throw null; }
@@ -157,6 +159,7 @@ namespace System.Numerics
         public static System.Numerics.BigInteger operator -(System.Numerics.BigInteger left, System.Numerics.BigInteger right) { throw null; }
         public static System.Numerics.BigInteger operator -(System.Numerics.BigInteger value) { throw null; }
         public static System.Numerics.BigInteger operator +(System.Numerics.BigInteger value) { throw null; }
+        public static System.Numerics.BigInteger Parse(System.ReadOnlySpan<char> value, System.Globalization.NumberStyles style=(System.Globalization.NumberStyles)(7), System.IFormatProvider provider=null) { throw null; }
         public static System.Numerics.BigInteger Parse(string value) { throw null; }
         public static System.Numerics.BigInteger Parse(string value, System.Globalization.NumberStyles style) { throw null; }
         public static System.Numerics.BigInteger Parse(string value, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -169,8 +172,10 @@ namespace System.Numerics
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> value, out System.Numerics.BigInteger result, System.Globalization.NumberStyles style=(System.Globalization.NumberStyles)(7), System.IFormatProvider provider=null) { result = default(System.Numerics.BigInteger); throw null; }
         public static bool TryParse(string value, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Numerics.BigInteger result) { result = default(System.Numerics.BigInteger); throw null; }
         public static bool TryParse(string value, out System.Numerics.BigInteger result) { result = default(System.Numerics.BigInteger); throw null; }
+        public bool TryWriteBytes(System.Span<byte> destination, out int bytesWritten) { bytesWritten = default(int); throw null; }
     }
     [System.SerializableAttribute]
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
diff --git a/profiles/monotouch/System.cs b/profiles/monotouch/System.cs
index a5340a2..d88e742 100644
--- a/profiles/monotouch/System.cs
+++ b/profiles/monotouch/System.cs
@@ -5321,6 +5321,7 @@ namespace System.IO.Compression
         public override long Position { get { throw null; } set { } }
         public override System.IAsyncResult BeginRead(byte[] array, int offset, int count, System.AsyncCallback asyncCallback, object asyncState) { throw null; }
         public override System.IAsyncResult BeginWrite(byte[] array, int offset, int count, System.AsyncCallback asyncCallback, object asyncState) { throw null; }
+        public override void CopyTo(System.IO.Stream destination, int bufferSize) { }
         public override System.Threading.Tasks.Task CopyToAsync(System.IO.Stream destination, int bufferSize, System.Threading.CancellationToken cancellationToken) { throw null; }
         protected override void Dispose(bool disposing) { }
         public override int EndRead(System.IAsyncResult asyncResult) { throw null; }
@@ -5328,11 +5329,13 @@ namespace System.IO.Compression
         public override void Flush() { }
         public override System.Threading.Tasks.Task FlushAsync(System.Threading.CancellationToken cancellationToken) { throw null; }
         public override int Read(byte[] array, int offset, int count) { throw null; }
+        public override int Read(System.Span<byte> destination) { throw null; }
         public override System.Threading.Tasks.Task<int> ReadAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
         public override int ReadByte() { throw null; }
         public override long Seek(long offset, System.IO.SeekOrigin origin) { throw null; }
         public override void SetLength(long value) { }
         public override void Write(byte[] array, int offset, int count) { }
+        public override void Write(System.ReadOnlySpan<byte> source) { }
         public override System.Threading.Tasks.Task WriteAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
     }
 }
diff --git a/profiles/monotouch/mscorlib.cs b/profiles/monotouch/mscorlib.cs
index 8b58726..c8890f9 100644
--- a/profiles/monotouch/mscorlib.cs
+++ b/profiles/monotouch/mscorlib.cs
@@ -2476,6 +2476,7 @@ namespace System
         [System.Security.SecuritySafeCriticalAttribute]
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static bool IsFinite(System.Double d) { throw null; }
         [System.Security.SecuritySafeCriticalAttribute]
         public static bool IsInfinity(System.Double d) { throw null; }
         [System.Runtime.ConstrainedExecution.ReliabilityContractAttribute((System.Runtime.ConstrainedExecution.Consistency)(3), (System.Runtime.ConstrainedExecution.Cer)(2))]
@@ -3822,6 +3823,32 @@ namespace System
         public RankException(string message) { }
         public RankException(string message, System.Exception innerException) { }
     }
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public partial struct ReadOnlySpan<T>
+    {
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public unsafe ReadOnlySpan(void* pointer, int length) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ReadOnlySpan(T[] array) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ReadOnlySpan(T[] array, int start, int length) { throw null;}
+        public static System.ReadOnlySpan<T> Empty { get { throw null; } }
+        public bool IsEmpty { get { throw null; } }
+        public T this[int index] { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        public int Length { get { throw null; } }
+        public void CopyTo(System.Span<T> destination) { }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static System.ReadOnlySpan<T> DangerousCreate(object obj, ref T objectData, int length) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ref T DangerousGetPinnableReference() { throw null; }
+        [System.ObsoleteAttribute("Equals() on Span will always throw an exception. Use == instead.")]
+        public override bool Equals(object obj) { throw null; }
+        [System.ObsoleteAttribute("GetHashCode() on Span will always throw an exception.")]
+        public override int GetHashCode() { throw null; }
+        public static bool operator ==(System.ReadOnlySpan<T> left, System.ReadOnlySpan<T> right) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (System.ArraySegment<T> arraySegment) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (T[] array) { throw null; }
+        public static bool operator !=(System.ReadOnlySpan<T> left, System.ReadOnlySpan<T> right) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.ReadOnlySpan<T> Slice(int start) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.ReadOnlySpan<T> Slice(int start, int length) { throw null; }
+        public T[] ToArray() { throw null; }
+        public bool TryCopyTo(System.Span<T> destination) { throw null; }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     public partial class ResolveEventArgs : System.EventArgs
     {
@@ -3962,6 +3989,7 @@ namespace System
         [System.Security.SecuritySafeCriticalAttribute]
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static bool IsFinite(System.Single f) { throw null; }
         [System.Security.SecuritySafeCriticalAttribute]
         public static bool IsInfinity(System.Single f) { throw null; }
         [System.Runtime.ConstrainedExecution.ReliabilityContractAttribute((System.Runtime.ConstrainedExecution.Consistency)(3), (System.Runtime.ConstrainedExecution.Cer)(2))]
@@ -4007,6 +4035,37 @@ namespace System
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Single result) { result = default(float); throw null; }
         public static bool TryParse(string s, out System.Single result) { result = default(float); throw null; }
     }
+    [System.Diagnostics.DebuggerDisplayAttribute("Length = {Length}")]
+    [System.Diagnostics.DebuggerTypeProxyAttribute("System.SpanDebugView<T>")]
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public partial struct Span<T>
+    {
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public unsafe Span(void* pointer, int length) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public Span(T[] array) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public Span(T[] array, int start, int length) { throw null;}
+        public static System.Span<T> Empty { get { throw null; } }
+        public bool IsEmpty { get { throw null; } }
+        public ref T this[int index] { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        public int Length { get { throw null; } }
+        public void Clear() { }
+        public void CopyTo(System.Span<T> destination) { }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static System.Span<T> DangerousCreate(object obj, ref T objectData, int length) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ref T DangerousGetPinnableReference() { throw null; }
+        [System.ObsoleteAttribute("Equals() on Span will always throw an exception. Use == instead.")]
+        public override bool Equals(object obj) { throw null; }
+        public void Fill(T value) { }
+        [System.ObsoleteAttribute("GetHashCode() on Span will always throw an exception.")]
+        public override int GetHashCode() { throw null; }
+        public static bool operator ==(System.Span<T> left, System.Span<T> right) { throw null; }
+        public static implicit operator System.Span<T> (System.ArraySegment<T> arraySegment) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (System.Span<T> span) { throw null; }
+        public static implicit operator System.Span<T> (T[] array) { throw null; }
+        public static bool operator !=(System.Span<T> left, System.Span<T> right) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.Span<T> Slice(int start) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.Span<T> Slice(int start, int length) { throw null; }
+        public T[] ToArray() { throw null; }
+        public bool TryCopyTo(System.Span<T> destination) { throw null; }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     [System.SerializableAttribute]
     public sealed partial class StackOverflowException : System.SystemException
@@ -9214,7 +9273,7 @@ namespace System.IO
         public virtual System.IAsyncResult BeginWrite(byte[] buffer, int offset, int count, System.AsyncCallback callback, object state) { throw null; }
         public virtual void Close() { }
         public void CopyTo(System.IO.Stream destination) { }
-        public void CopyTo(System.IO.Stream destination, int bufferSize) { }
+        public virtual void CopyTo(System.IO.Stream destination, int bufferSize) { }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task CopyToAsync(System.IO.Stream destination) { throw null; }
@@ -9240,6 +9299,7 @@ namespace System.IO
         [System.ObsoleteAttribute("Do not call or override this method.")]
         protected virtual void ObjectInvariant() { }
         public abstract int Read([System.Runtime.InteropServices.In][System.Runtime.InteropServices.Out]byte[] buffer, int offset, int count);
+        public virtual int Read(System.Span<byte> destination) { throw null; }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task<int> ReadAsync(byte[] buffer, int offset, int count) { throw null; }
@@ -9252,6 +9312,7 @@ namespace System.IO
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Synchronization=true)]
         public static System.IO.Stream Synchronized(System.IO.Stream stream) { throw null; }
         public abstract void Write(byte[] buffer, int offset, int count);
+        public virtual void Write(System.ReadOnlySpan<byte> source) { }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task WriteAsync(byte[] buffer, int offset, int count) { throw null; }
diff --git a/profiles/net_4_x/System.Drawing.cs b/profiles/net_4_x/System.Drawing.cs
index 9ed1994..1daaa96 100644
--- a/profiles/net_4_x/System.Drawing.cs
+++ b/profiles/net_4_x/System.Drawing.cs
@@ -2307,7 +2307,7 @@ namespace System.Drawing.Drawing2D
         public float BaseInset { get { throw null; } set { } }
         public System.Drawing.Drawing2D.LineJoin StrokeJoin { get { throw null; } set { } }
         public float WidthScale { get { throw null; } set { } }
-        public object Clone() { throw null; }
+        public virtual object Clone() { throw null; }
         public void Dispose() { }
         protected virtual void Dispose(bool disposing) { }
         ~CustomLineCap() { }
diff --git a/profiles/net_4_x/System.Numerics.cs b/profiles/net_4_x/System.Numerics.cs
index 48df09a..a6501e3 100644
--- a/profiles/net_4_x/System.Numerics.cs
+++ b/profiles/net_4_x/System.Numerics.cs
@@ -32,6 +32,7 @@ namespace System.Numerics
         public BigInteger(double value) { throw null;}
         public BigInteger(int value) { throw null;}
         public BigInteger(long value) { throw null;}
+        public BigInteger(System.ReadOnlySpan<byte> value) { throw null;}
         public BigInteger(float value) { throw null;}
         [System.CLSCompliantAttribute(false)]
         public BigInteger(uint value) { throw null;}
@@ -60,6 +61,7 @@ namespace System.Numerics
         public override bool Equals(object obj) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public bool Equals(ulong other) { throw null; }
+        public int GetByteCount() { throw null; }
         public override int GetHashCode() { throw null; }
         public static System.Numerics.BigInteger GreatestCommonDivisor(System.Numerics.BigInteger left, System.Numerics.BigInteger right) { throw null; }
         public static double Log(System.Numerics.BigInteger value) { throw null; }
@@ -157,6 +159,7 @@ namespace System.Numerics
         public static System.Numerics.BigInteger operator -(System.Numerics.BigInteger left, System.Numerics.BigInteger right) { throw null; }
         public static System.Numerics.BigInteger operator -(System.Numerics.BigInteger value) { throw null; }
         public static System.Numerics.BigInteger operator +(System.Numerics.BigInteger value) { throw null; }
+        public static System.Numerics.BigInteger Parse(System.ReadOnlySpan<char> value, System.Globalization.NumberStyles style=(System.Globalization.NumberStyles)(7), System.IFormatProvider provider=null) { throw null; }
         public static System.Numerics.BigInteger Parse(string value) { throw null; }
         public static System.Numerics.BigInteger Parse(string value, System.Globalization.NumberStyles style) { throw null; }
         public static System.Numerics.BigInteger Parse(string value, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -169,8 +172,10 @@ namespace System.Numerics
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> value, out System.Numerics.BigInteger result, System.Globalization.NumberStyles style=(System.Globalization.NumberStyles)(7), System.IFormatProvider provider=null) { result = default(System.Numerics.BigInteger); throw null; }
         public static bool TryParse(string value, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Numerics.BigInteger result) { result = default(System.Numerics.BigInteger); throw null; }
         public static bool TryParse(string value, out System.Numerics.BigInteger result) { result = default(System.Numerics.BigInteger); throw null; }
+        public bool TryWriteBytes(System.Span<byte> destination, out int bytesWritten) { bytesWritten = default(int); throw null; }
     }
     [System.SerializableAttribute]
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
diff --git a/profiles/net_4_x/System.cs b/profiles/net_4_x/System.cs
index cb4a302..3b0a683 100644
--- a/profiles/net_4_x/System.cs
+++ b/profiles/net_4_x/System.cs
@@ -1786,6 +1786,7 @@ namespace System.CodeDom.Compiler
         CaseInsensitive = 1,
         None = 0,
     }
+    [System.SerializableAttribute]
     public partial class TempFileCollection : System.Collections.ICollection, System.Collections.IEnumerable, System.IDisposable
     {
         public TempFileCollection() { }
@@ -7735,6 +7736,7 @@ namespace System.IO.Compression
         public override long Position { get { throw null; } set { } }
         public override System.IAsyncResult BeginRead(byte[] array, int offset, int count, System.AsyncCallback asyncCallback, object asyncState) { throw null; }
         public override System.IAsyncResult BeginWrite(byte[] array, int offset, int count, System.AsyncCallback asyncCallback, object asyncState) { throw null; }
+        public override void CopyTo(System.IO.Stream destination, int bufferSize) { }
         public override System.Threading.Tasks.Task CopyToAsync(System.IO.Stream destination, int bufferSize, System.Threading.CancellationToken cancellationToken) { throw null; }
         protected override void Dispose(bool disposing) { }
         public override int EndRead(System.IAsyncResult asyncResult) { throw null; }
@@ -7742,11 +7744,13 @@ namespace System.IO.Compression
         public override void Flush() { }
         public override System.Threading.Tasks.Task FlushAsync(System.Threading.CancellationToken cancellationToken) { throw null; }
         public override int Read(byte[] array, int offset, int count) { throw null; }
+        public override int Read(System.Span<byte> destination) { throw null; }
         public override System.Threading.Tasks.Task<int> ReadAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
         public override int ReadByte() { throw null; }
         public override long Seek(long offset, System.IO.SeekOrigin origin) { throw null; }
         public override void SetLength(long value) { }
         public override void Write(byte[] array, int offset, int count) { }
+        public override void Write(System.ReadOnlySpan<byte> source) { }
         public override System.Threading.Tasks.Task WriteAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
     }
 }
diff --git a/profiles/net_4_x/mscorlib.cs b/profiles/net_4_x/mscorlib.cs
index c91cf06..657a213 100644
--- a/profiles/net_4_x/mscorlib.cs
+++ b/profiles/net_4_x/mscorlib.cs
@@ -2546,6 +2546,7 @@ namespace System
         [System.Security.SecuritySafeCriticalAttribute]
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static bool IsFinite(System.Double d) { throw null; }
         [System.Security.SecuritySafeCriticalAttribute]
         public static bool IsInfinity(System.Double d) { throw null; }
         [System.Runtime.ConstrainedExecution.ReliabilityContractAttribute((System.Runtime.ConstrainedExecution.Consistency)(3), (System.Runtime.ConstrainedExecution.Cer)(2))]
@@ -3891,6 +3892,32 @@ namespace System
         public RankException(string message) { }
         public RankException(string message, System.Exception innerException) { }
     }
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public partial struct ReadOnlySpan<T>
+    {
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public unsafe ReadOnlySpan(void* pointer, int length) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ReadOnlySpan(T[] array) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ReadOnlySpan(T[] array, int start, int length) { throw null;}
+        public static System.ReadOnlySpan<T> Empty { get { throw null; } }
+        public bool IsEmpty { get { throw null; } }
+        public T this[int index] { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        public int Length { get { throw null; } }
+        public void CopyTo(System.Span<T> destination) { }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static System.ReadOnlySpan<T> DangerousCreate(object obj, ref T objectData, int length) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ref T DangerousGetPinnableReference() { throw null; }
+        [System.ObsoleteAttribute("Equals() on Span will always throw an exception. Use == instead.")]
+        public override bool Equals(object obj) { throw null; }
+        [System.ObsoleteAttribute("GetHashCode() on Span will always throw an exception.")]
+        public override int GetHashCode() { throw null; }
+        public static bool operator ==(System.ReadOnlySpan<T> left, System.ReadOnlySpan<T> right) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (System.ArraySegment<T> arraySegment) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (T[] array) { throw null; }
+        public static bool operator !=(System.ReadOnlySpan<T> left, System.ReadOnlySpan<T> right) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.ReadOnlySpan<T> Slice(int start) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.ReadOnlySpan<T> Slice(int start, int length) { throw null; }
+        public T[] ToArray() { throw null; }
+        public bool TryCopyTo(System.Span<T> destination) { throw null; }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     public partial class ResolveEventArgs : System.EventArgs
     {
@@ -4031,6 +4058,7 @@ namespace System
         [System.Security.SecuritySafeCriticalAttribute]
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static bool IsFinite(System.Single f) { throw null; }
         [System.Security.SecuritySafeCriticalAttribute]
         public static bool IsInfinity(System.Single f) { throw null; }
         [System.Runtime.ConstrainedExecution.ReliabilityContractAttribute((System.Runtime.ConstrainedExecution.Consistency)(3), (System.Runtime.ConstrainedExecution.Cer)(2))]
@@ -4076,6 +4104,37 @@ namespace System
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Single result) { result = default(float); throw null; }
         public static bool TryParse(string s, out System.Single result) { result = default(float); throw null; }
     }
+    [System.Diagnostics.DebuggerDisplayAttribute("Length = {Length}")]
+    [System.Diagnostics.DebuggerTypeProxyAttribute("System.SpanDebugView<T>")]
+    [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
+    public partial struct Span<T>
+    {
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public unsafe Span(void* pointer, int length) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public Span(T[] array) { throw null;}
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public Span(T[] array, int start, int length) { throw null;}
+        public static System.Span<T> Empty { get { throw null; } }
+        public bool IsEmpty { get { throw null; } }
+        public ref T this[int index] { [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]get { throw null; } }
+        public int Length { get { throw null; } }
+        public void Clear() { }
+        public void CopyTo(System.Span<T> destination) { }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public static System.Span<T> DangerousCreate(object obj, ref T objectData, int length) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public ref T DangerousGetPinnableReference() { throw null; }
+        [System.ObsoleteAttribute("Equals() on Span will always throw an exception. Use == instead.")]
+        public override bool Equals(object obj) { throw null; }
+        public void Fill(T value) { }
+        [System.ObsoleteAttribute("GetHashCode() on Span will always throw an exception.")]
+        public override int GetHashCode() { throw null; }
+        public static bool operator ==(System.Span<T> left, System.Span<T> right) { throw null; }
+        public static implicit operator System.Span<T> (System.ArraySegment<T> arraySegment) { throw null; }
+        public static implicit operator System.ReadOnlySpan<T> (System.Span<T> span) { throw null; }
+        public static implicit operator System.Span<T> (T[] array) { throw null; }
+        public static bool operator !=(System.Span<T> left, System.Span<T> right) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.Span<T> Slice(int start) { throw null; }
+        [System.Runtime.CompilerServices.MethodImpl(System.Runtime.CompilerServices.MethodImplOptions.AggressiveInlining)]public System.Span<T> Slice(int start, int length) { throw null; }
+        public T[] ToArray() { throw null; }
+        public bool TryCopyTo(System.Span<T> destination) { throw null; }
+    }
     [System.Runtime.InteropServices.ComVisibleAttribute(true)]
     [System.SerializableAttribute]
     public sealed partial class StackOverflowException : System.SystemException
@@ -9286,7 +9345,7 @@ namespace System.IO
         public virtual System.IAsyncResult BeginWrite(byte[] buffer, int offset, int count, System.AsyncCallback callback, object state) { throw null; }
         public virtual void Close() { }
         public void CopyTo(System.IO.Stream destination) { }
-        public void CopyTo(System.IO.Stream destination, int bufferSize) { }
+        public virtual void CopyTo(System.IO.Stream destination, int bufferSize) { }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task CopyToAsync(System.IO.Stream destination) { throw null; }
@@ -9312,6 +9371,7 @@ namespace System.IO
         [System.ObsoleteAttribute("Do not call or override this method.")]
         protected virtual void ObjectInvariant() { }
         public abstract int Read([System.Runtime.InteropServices.In][System.Runtime.InteropServices.Out]byte[] buffer, int offset, int count);
+        public virtual int Read(System.Span<byte> destination) { throw null; }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task<int> ReadAsync(byte[] buffer, int offset, int count) { throw null; }
@@ -9324,6 +9384,7 @@ namespace System.IO
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, Synchronization=true)]
         public static System.IO.Stream Synchronized(System.IO.Stream stream) { throw null; }
         public abstract void Write(byte[] buffer, int offset, int count);
+        public virtual void Write(System.ReadOnlySpan<byte> source) { }
         [System.Runtime.InteropServices.ComVisibleAttribute(false)]
         [System.Security.Permissions.HostProtectionAttribute(System.Security.Permissions.SecurityAction.LinkDemand, ExternalThreading=true)]
         public System.Threading.Tasks.Task WriteAsync(byte[] buffer, int offset, int count) { throw null; }