优化了SereinWebSocket的API

Serein.Proto.WebSocket/SereinWebSocketHandleException.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Proto.WebSocket
+{
+    /// <summary>
+    /// WebSocket处理异常
+    /// </summary>
+    [Serializable]
+    internal sealed class SereinWebSocketHandleException : Exception
+    {
+        public SereinWebSocketHandleException()
+        {
+        }
+
+        public SereinWebSocketHandleException(string message)
+            : base(message)
+        {
+        }
+
+        public SereinWebSocketHandleException(string message, Exception innerException)
+            : base(message, innerException)
+        {
+        }
+
+        private SereinWebSocketHandleException(SerializationInfo info, StreamingContext context): base(info, context)
+        {
+        }
+    }
+}