Elide SocketFlags in Socket API (#57634)

* Elide SocketFlags in Socket API

Fix #43934

* Fix SocketAsyncEventArgs tests

* Cosmetics

* Elide SocketFlags in tests

* Comments

Author: i3arnon

src/libraries/System.Net.Sockets/ref/System.Net.Sockets.cs

@@ -381,8 +381,11 @@ public void Listen(int backlog) { }
         public int Receive(System.Span<byte> buffer) { throw null; }
         public int Receive(System.Span<byte> buffer, System.Net.Sockets.SocketFlags socketFlags) { throw null; }
         public int Receive(System.Span<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, out System.Net.Sockets.SocketError errorCode) { throw null; }
+        public System.Threading.Tasks.Task<int> ReceiveAsync(System.ArraySegment<byte> buffer) { throw null; }
         public System.Threading.Tasks.Task<int> ReceiveAsync(System.ArraySegment<byte> buffer, System.Net.Sockets.SocketFlags socketFlags) { throw null; }
+        public System.Threading.Tasks.Task<int> ReceiveAsync(System.Collections.Generic.IList<System.ArraySegment<byte>> buffers) { throw null; }
         public System.Threading.Tasks.Task<int> ReceiveAsync(System.Collections.Generic.IList<System.ArraySegment<byte>> buffers, System.Net.Sockets.SocketFlags socketFlags) { throw null; }
+        public System.Threading.Tasks.ValueTask<int> ReceiveAsync(System.Memory<byte> buffer, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public System.Threading.Tasks.ValueTask<int> ReceiveAsync(System.Memory<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public bool ReceiveAsync(System.Net.Sockets.SocketAsyncEventArgs e) { throw null; }
         public int ReceiveFrom(byte[] buffer, int offset, int size, System.Net.Sockets.SocketFlags socketFlags, ref System.Net.EndPoint remoteEP) { throw null; }
@@ -391,12 +394,16 @@ public void Listen(int backlog) { }
         public int ReceiveFrom(byte[] buffer, System.Net.Sockets.SocketFlags socketFlags, ref System.Net.EndPoint remoteEP) { throw null; }
         public int ReceiveFrom(System.Span<byte> buffer, ref System.Net.EndPoint remoteEP) { throw null; }
         public int ReceiveFrom(System.Span<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, ref System.Net.EndPoint remoteEP) { throw null; }
+        public System.Threading.Tasks.Task<System.Net.Sockets.SocketReceiveFromResult> ReceiveFromAsync(System.ArraySegment<byte> buffer, System.Net.EndPoint remoteEndPoint) { throw null; }
         public System.Threading.Tasks.Task<System.Net.Sockets.SocketReceiveFromResult> ReceiveFromAsync(System.ArraySegment<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEndPoint) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Net.Sockets.SocketReceiveFromResult> ReceiveFromAsync(System.Memory<byte> buffer, System.Net.EndPoint remoteEndPoint, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public System.Threading.Tasks.ValueTask<System.Net.Sockets.SocketReceiveFromResult> ReceiveFromAsync(System.Memory<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEndPoint, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public bool ReceiveFromAsync(System.Net.Sockets.SocketAsyncEventArgs e) { throw null; }
         public int ReceiveMessageFrom(byte[] buffer, int offset, int size, ref System.Net.Sockets.SocketFlags socketFlags, ref System.Net.EndPoint remoteEP, out System.Net.Sockets.IPPacketInformation ipPacketInformation) { throw null; }
         public int ReceiveMessageFrom(System.Span<byte> buffer, ref System.Net.Sockets.SocketFlags socketFlags, ref System.Net.EndPoint remoteEP, out System.Net.Sockets.IPPacketInformation ipPacketInformation) { throw null; }
+        public System.Threading.Tasks.Task<System.Net.Sockets.SocketReceiveMessageFromResult> ReceiveMessageFromAsync(System.ArraySegment<byte> buffer, System.Net.EndPoint remoteEndPoint) { throw null; }
         public System.Threading.Tasks.Task<System.Net.Sockets.SocketReceiveMessageFromResult> ReceiveMessageFromAsync(System.ArraySegment<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEndPoint) { throw null; }
+        public System.Threading.Tasks.ValueTask<System.Net.Sockets.SocketReceiveMessageFromResult> ReceiveMessageFromAsync(System.Memory<byte> buffer, System.Net.EndPoint remoteEndPoint, System.Threading.CancellationToken cancellationToken = default) { throw null; }
         public System.Threading.Tasks.ValueTask<System.Net.Sockets.SocketReceiveMessageFromResult> ReceiveMessageFromAsync(System.Memory<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEndPoint, System.Threading.CancellationToken cancellationToken = default) { throw null; }
         public bool ReceiveMessageFromAsync(System.Net.Sockets.SocketAsyncEventArgs e) { throw null; }
         public static void Select(System.Collections.IList? checkRead, System.Collections.IList? checkWrite, System.Collections.IList? checkError, int microSeconds) { }
@@ -411,8 +418,11 @@ public static void Select(System.Collections.IList? checkRead, System.Collection
         public int Send(System.ReadOnlySpan<byte> buffer) { throw null; }
         public int Send(System.ReadOnlySpan<byte> buffer, System.Net.Sockets.SocketFlags socketFlags) { throw null; }
         public int Send(System.ReadOnlySpan<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, out System.Net.Sockets.SocketError errorCode) { throw null; }
+        public System.Threading.Tasks.Task<int> SendAsync(System.ArraySegment<byte> buffer) { throw null; }
         public System.Threading.Tasks.Task<int> SendAsync(System.ArraySegment<byte> buffer, System.Net.Sockets.SocketFlags socketFlags) { throw null; }
+        public System.Threading.Tasks.Task<int> SendAsync(System.Collections.Generic.IList<System.ArraySegment<byte>> buffers) { throw null; }
         public System.Threading.Tasks.Task<int> SendAsync(System.Collections.Generic.IList<System.ArraySegment<byte>> buffers, System.Net.Sockets.SocketFlags socketFlags) { throw null; }
+        public System.Threading.Tasks.ValueTask<int> SendAsync(System.ReadOnlyMemory<byte> buffer, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public System.Threading.Tasks.ValueTask<int> SendAsync(System.ReadOnlyMemory<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public bool SendAsync(System.Net.Sockets.SocketAsyncEventArgs e) { throw null; }
         public void SendFile(string? fileName) { }
@@ -427,7 +437,9 @@ public void SendFile(string? fileName, System.ReadOnlySpan<byte> preBuffer, Syst
         public int SendTo(byte[] buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEP) { throw null; }
         public int SendTo(System.ReadOnlySpan<byte> buffer, System.Net.EndPoint remoteEP) { throw null; }
         public int SendTo(System.ReadOnlySpan<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEP) { throw null; }
+        public System.Threading.Tasks.Task<int> SendToAsync(System.ArraySegment<byte> buffer, System.Net.EndPoint remoteEP) { throw null; }
         public System.Threading.Tasks.Task<int> SendToAsync(System.ArraySegment<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEP) { throw null; }
+        public System.Threading.Tasks.ValueTask<int> SendToAsync(System.ReadOnlyMemory<byte> buffer, System.Net.EndPoint remoteEP, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public System.Threading.Tasks.ValueTask<int> SendToAsync(System.ReadOnlyMemory<byte> buffer, System.Net.Sockets.SocketFlags socketFlags, System.Net.EndPoint remoteEP, System.Threading.CancellationToken cancellationToken = default(System.Threading.CancellationToken)) { throw null; }
         public bool SendToAsync(System.Net.Sockets.SocketAsyncEventArgs e) { throw null; }
         [System.Runtime.Versioning.SupportedOSPlatformAttribute("windows")]
@@ -591,6 +603,7 @@ public enum SocketShutdown
         Send = 1,
         Both = 2,
     }
+    [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]
     public static partial class SocketTaskExtensions
     {
         [System.ComponentModel.EditorBrowsableAttribute(System.ComponentModel.EditorBrowsableState.Never)]