Update to 3.5.2 and .net core 2.1

Emby.Server.Implementations/Net/IWebSocket.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Net.WebSockets;
+
+namespace Emby.Server.Implementations.Net
+{
+    /// <summary>
+    /// Interface IWebSocket
+    /// </summary>
+    public interface IWebSocket : IDisposable
+    {
+        /// <summary>
+        /// Occurs when [closed].
+        /// </summary>
+        event EventHandler<EventArgs> Closed;
+
+        /// <summary>
+        /// Gets or sets the state.
+        /// </summary>
+        /// <value>The state.</value>
+        WebSocketState State { get; }
+
+        /// <summary>
+        /// Gets or sets the receive action.
+        /// </summary>
+        /// <value>The receive action.</value>
+        Action<byte[]> OnReceiveBytes { get; set; }
+
+        /// <summary>
+        /// Sends the async.
+        /// </summary>
+        /// <param name="bytes">The bytes.</param>
+        /// <param name="endOfMessage">if set to <c>true</c> [end of message].</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task SendAsync(byte[] bytes, bool endOfMessage, CancellationToken cancellationToken);
+
+        /// <summary>
+        /// Sends the asynchronous.
+        /// </summary>
+        /// <param name="text">The text.</param>
+        /// <param name="endOfMessage">if set to <c>true</c> [end of message].</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        Task SendAsync(string text, bool endOfMessage, CancellationToken cancellationToken);
+    }
+
+    public interface IMemoryWebSocket
+    {
+        Action<Memory<byte>, int> OnReceiveMemoryBytes { get; set; }
+    }
+}