Client Web Socket implementation (#46)

SystemExtensions.NetStandard/WebSockets/IClientWebSocket.cs

@@ -0,0 +1,31 @@
+using System.Threading.Tasks;
+using System.Threading;
+
+namespace System.Net.WebSockets;
+
+public interface IClientWebSocket<TScope>
+{
+    WebSocketCloseStatus? CloseStatus { get; }
+    
+    string CloseStatusDescription { get; }
+    
+    ClientWebSocketOptions Options { get; }
+    
+    WebSocketState State { get; }
+    
+    string SubProtocol { get; }
+
+    void Abort();
+
+    Task CloseAsync(WebSocketCloseStatus closeStatus, string statusDescription, CancellationToken cancellationToken);
+
+    Task CloseOutputAsync(WebSocketCloseStatus closeStatus, string statusDescription, CancellationToken cancellationToken);
+
+    Task ConnectAsync(Uri uri, CancellationToken cancellationToken);
+
+    void Dispose();
+
+    Task<WebSocketReceiveResult> ReceiveAsync(ArraySegment<byte> buffer, CancellationToken cancellationToken);
+
+    Task SendAsync(ArraySegment<byte> buffer, WebSocketMessageType messageType, bool endOfMessage, CancellationToken cancellationToken);
+}