diff --git a/websocket-sharp/Server/WebSocketService.cs b/websocket-sharp/Server/WebSocketService.cs
index 04c15e77..92633f12 100644
--- a/websocket-sharp/Server/WebSocketService.cs
+++ b/websocket-sharp/Server/WebSocketService.cs
@@ -29,6 +29,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Specialized;
+using System.IO;
 using System.Text;
 using System.Threading;
 using WebSocketSharp.Net;
@@ -225,6 +226,11 @@ namespace WebSocketSharp.Server
       IsBound = true;
     }
 
+    internal void Start ()
+    {
+      _websocket.Connect ();
+    }
+
     #endregion
 
     #region Protected Methods
@@ -235,7 +241,7 @@ namespace WebSocketSharp.Server
     /// <param name="message">
     /// A <see cref="string"/> that contains an error message.
     /// </param>
-    protected virtual void Error (string message)
+    protected void Error (string message)
     {
       if (!message.IsNullOrEmpty ())
         OnError (new ErrorEventArgs (message));
@@ -282,33 +288,6 @@ namespace WebSocketSharp.Server
     {
     }
 
-    /// <summary>
-    /// Validates the cookies used in the WebSocket connection request.
-    /// </summary>
-    /// <remarks>
-    /// This method is called when the inner <see cref="WebSocket"/> validates
-    /// the WebSocket connection request.
-    /// </remarks>
-    /// <returns>
-    /// <c>true</c> if the cookies is valid; otherwise, <c>false</c>.
-    /// The default returns <c>true</c>.
-    /// </returns>
-    /// <param name="request">
-    /// A <see cref="CookieCollection"/> that contains a collection of the HTTP Cookies
-    /// to validate.
-    /// </param>
-    /// <param name="response">
-    /// A <see cref="CookieCollection"/> that receives the HTTP Cookies to send to the client.
-    /// </param>
-    protected virtual bool ValidateCookies (CookieCollection request, CookieCollection response)
-    {
-      return true;
-    }
-
-    #endregion
-
-    #region Public Methods
-
     /// <summary>
     /// Sends a Ping to the client of the current <see cref="WebSocketService"/> instance.
     /// </summary>
@@ -316,7 +295,7 @@ namespace WebSocketSharp.Server
     /// <c>true</c> if the current <see cref="WebSocketService"/> instance receives a Pong
     /// from the client in a time; otherwise, <c>false</c>.
     /// </returns>
-    public bool Ping ()
+    protected bool Ping ()
     {
       return IsBound
              ? _websocket.Ping ()
@@ -334,7 +313,7 @@ namespace WebSocketSharp.Server
     /// <param name="message">
     /// A <see cref="string"/> that contains a message to send.
     /// </param>
-    public bool Ping (string message)
+    protected bool Ping (string message)
     {
       return IsBound
              ? _websocket.Ping (message)
@@ -345,75 +324,172 @@ namespace WebSocketSharp.Server
     /// Sends a binary <paramref name="data"/> to the client of the current
     /// <see cref="WebSocketService"/> instance.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// An array of <see cref="byte"/> that contains a binary data to send.
     /// </param>
-    public virtual void Send (byte [] data)
+    protected void Send (byte [] data)
     {
       if (IsBound)
-        _websocket.Send (data);
+        _websocket.Send (data, null);
     }
 
     /// <summary>
     /// Sends a text <paramref name="data"/> to the client of the current
     /// <see cref="WebSocketService"/> instance.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// A <see cref="string"/> that contains a text data to send.
     /// </param>
-    public virtual void Send (string data)
+    protected void Send (string data)
     {
       if (IsBound)
-        _websocket.Send (data);
+        _websocket.Send (data, null);
+    }
+
+    /// <summary>
+    /// Sends a binary data from the specified <see cref="FileInfo"/> to
+    /// the client of the current <see cref="WebSocketService"/> instance.
+    /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
+    /// <param name="file">
+    /// A <see cref="FileInfo"/> from which contains a binary data to send.
+    /// </param>
+    protected void Send (FileInfo file)
+    {
+      if (IsBound)
+        _websocket.Send (file, null);
     }
 
     /// <summary>
     /// Sends a binary <paramref name="data"/> to the client of the current
-    /// <see cref="WebSocketService"/> instance asynchronously.
+    /// <see cref="WebSocketService"/> instance.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// An array of <see cref="byte"/> that contains a binary data to send.
     /// </param>
     /// <param name="completed">
-    /// An <see cref="Action"/> delegate that references the method(s) called when
-    /// the asynchronous operation completes.
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is
+    /// complete successfully; otherwise, <c>false</c>.
     /// </param>
-    public virtual void SendAsync (byte [] data, Action completed)
+    protected void Send (byte [] data, Action<bool> completed)
     {
       if (IsBound)
-        _websocket.SendAsync (data, completed);
+        _websocket.Send (data, completed);
     }
 
     /// <summary>
     /// Sends a text <paramref name="data"/> to the client of the current
-    /// <see cref="WebSocketService"/> instance asynchronously.
+    /// <see cref="WebSocketService"/> instance.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// A <see cref="string"/> that contains a text data to send.
     /// </param>
     /// <param name="completed">
-    /// An <see cref="Action"/> delegate that references the method(s) called when
-    /// the asynchronous operation completes.
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is
+    /// complete successfully; otherwise, <c>false</c>.
+    /// </param>
+    protected void Send (string data, Action<bool> completed)
+    {
+      if (IsBound)
+        _websocket.Send (data, completed);
+    }
+
+    /// <summary>
+    /// Sends a binary data from the specified <see cref="FileInfo"/> to
+    /// the client of the current <see cref="WebSocketService"/> instance.
+    /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
+    /// <param name="file">
+    /// A <see cref="FileInfo"/> from which contains a binary data to send.
+    /// </param>
+    /// <param name="completed">
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is
+    /// complete successfully; otherwise, <c>false</c>.
     /// </param>
-    public virtual void SendAsync (string data, Action completed)
+    protected void Send (FileInfo file, Action<bool> completed)
     {
       if (IsBound)
-        _websocket.SendAsync (data, completed);
+        _websocket.Send (file, completed);
     }
 
     /// <summary>
-    /// Starts the current <see cref="WebSocketService"/> instance.
+    /// Sends a binary data from the specified <see cref="Stream"/> to
+    /// the client of the current <see cref="WebSocketService"/> instance.
     /// </summary>
-    public void Start ()
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
+    /// <param name="stream">
+    /// A <see cref="Stream"/> object from which contains a binary data to send.
+    /// </param>
+    /// <param name="length">
+    /// An <see cref="int"/> that contains the number of bytes to send.
+    /// </param>
+    /// <param name="dispose">
+    /// <c>true</c> if <paramref name="stream"/> is disposed after a binary data read;
+    /// otherwise, <c>false</c>.
+    /// </param>
+    protected void Send (Stream stream, int length, bool dispose)
+    {
+      if (IsBound)
+        _websocket.Send (stream, length, dispose, null);
+    }
+
+    /// <summary>
+    /// Sends a binary data from the specified <see cref="Stream"/> to
+    /// the client of the current <see cref="WebSocketService"/> instance.
+    /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
+    /// <param name="stream">
+    /// A <see cref="Stream"/> object from which contains a binary data to send.
+    /// </param>
+    /// <param name="length">
+    /// An <see cref="int"/> that contains the number of bytes to send.
+    /// </param>
+    /// <param name="dispose">
+    /// <c>true</c> if <paramref name="stream"/> is disposed after a binary data read;
+    /// otherwise, <c>false</c>.
+    /// </param>
+    /// <param name="completed">
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is
+    /// complete successfully; otherwise, <c>false</c>.
+    /// </param>
+    protected void Send (Stream stream, int length, bool dispose, Action<bool> completed)
     {
       if (IsBound)
-        _websocket.Connect ();
+        _websocket.Send (stream, length, dispose, completed);
     }
 
     /// <summary>
     /// Stops the current <see cref="WebSocketService"/> instance.
     /// </summary>
-    public void Stop ()
+    protected void Stop ()
     {
       if (IsBound)
         _websocket.Close ();
@@ -429,7 +505,7 @@ namespace WebSocketSharp.Server
     /// <param name="reason">
     /// A <see cref="string"/> that contains the reason for stop.
     /// </param>
-    public void Stop (ushort code, string reason)
+    protected void Stop (ushort code, string reason)
     {
       if (IsBound)
         _websocket.Close (code, reason);
@@ -446,12 +522,35 @@ namespace WebSocketSharp.Server
     /// <param name="reason">
     /// A <see cref="string"/> that contains the reason for stop.
     /// </param>
-    public void Stop (CloseStatusCode code, string reason)
+    protected void Stop (CloseStatusCode code, string reason)
     {
       if (IsBound)
         _websocket.Close (code, reason);
     }
 
+    /// <summary>
+    /// Validates the cookies used in the WebSocket connection request.
+    /// </summary>
+    /// <remarks>
+    /// This method is called when the inner <see cref="WebSocket"/> validates
+    /// the WebSocket connection request.
+    /// </remarks>
+    /// <returns>
+    /// <c>true</c> if the cookies is valid; otherwise, <c>false</c>.
+    /// The default returns <c>true</c>.
+    /// </returns>
+    /// <param name="request">
+    /// A <see cref="CookieCollection"/> that contains a collection of the HTTP Cookies
+    /// to validate.
+    /// </param>
+    /// <param name="response">
+    /// A <see cref="CookieCollection"/> that receives the HTTP Cookies to send to the client.
+    /// </param>
+    protected virtual bool ValidateCookies (CookieCollection request, CookieCollection response)
+    {
+      return true;
+    }
+
     #endregion
   }
 }
diff --git a/websocket-sharp/Server/WebSocketSessionManager.cs b/websocket-sharp/Server/WebSocketSessionManager.cs
index ac4f5afb..d8273d80 100644
--- a/websocket-sharp/Server/WebSocketSessionManager.cs
+++ b/websocket-sharp/Server/WebSocketSessionManager.cs
@@ -649,14 +649,14 @@ namespace WebSocketSharp.Server
         return;
       }
 
-      WebSocketService service;
-      if (!TryGetServiceInstance (id, out service))
+      WebSocketService session;
+      if (!TryGetServiceInstance (id, out session))
       {
         _logger.Error ("The WebSocket session with the specified ID not found.\nID: " + id);
         return;
       }
 
-      service.Send (data);
+      session.Context.WebSocket.Send (data, null);
     }
 
     /// <summary>
@@ -678,14 +678,14 @@ namespace WebSocketSharp.Server
         return;
       }
 
-      WebSocketService service;
-      if (!TryGetServiceInstance (id, out service))
+      WebSocketService session;
+      if (!TryGetServiceInstance (id, out session))
       {
         _logger.Error ("The WebSocket session with the specified ID not found.\nID: " + id);
         return;
       }
 
-      service.Send (data);
+      session.Context.WebSocket.Send (data, null);
     }
 
     /// <summary>
diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index a8c075d9..d0765bd4 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -1028,65 +1028,72 @@ namespace WebSocketSharp
       return _stream.Write (frame.ToByteArray ());
     }
 
-    private void send (Opcode opcode, byte [] data)
+    private bool send (Opcode opcode, byte [] data)
     {
       lock (_forSend)
       {
+        var sent = false;
         try {
-          var comped = false;
+          var compressed = false;
           if (_compression != CompressionMethod.NONE)
           {
             data = data.Compress (_compression);
-            comped = true;
+            compressed = true;
           }
-          
-          send (WsFrame.CreateFrame (
-            Fin.FINAL, opcode, _client ? Mask.MASK : Mask.UNMASK, data, comped));
+
+          sent = send (WsFrame.CreateFrame (
+            Fin.FINAL, opcode, _client ? Mask.MASK : Mask.UNMASK, data, compressed));
         }
         catch (Exception ex) {
           _logger.Fatal (ex.ToString ());
           error ("An exception has occured.");
         }
+
+        return sent;
       }
     }
 
-    private void send (Opcode opcode, Stream stream)
+    private bool send (Opcode opcode, Stream stream)
     {
       lock (_forSend)
       {
-        var comp = stream;
-        var comped = false;
+        var sent = false;
+
+        var src = stream;
+        var compressed = false;
         try {
           if (_compression != CompressionMethod.NONE)
           {
-            comp = stream.Compress (_compression);
-            comped = true;
+            stream = stream.Compress (_compression);
+            compressed = true;
           }
 
-          sendFragmented (opcode, comp, _client ? Mask.MASK : Mask.UNMASK, comped);
+          sent = sendFragmented (opcode, stream, _client ? Mask.MASK : Mask.UNMASK, compressed);
         }
         catch (Exception ex) {
           _logger.Fatal (ex.ToString ());
           error ("An exception has occured.");
         }
         finally {
-          if (comped)
-            comp.Dispose ();
+          if (compressed)
+            stream.Dispose ();
 
-          stream.Dispose ();
+          src.Dispose ();
         }
+
+        return sent;
       }
     }
 
-    private void sendAsync (Opcode opcode, byte [] data, Action completed)
+    private void send (Opcode opcode, byte [] data, Action<bool> completed)
     {
-      Action<Opcode, byte []> sender = send;
+      Func<Opcode, byte [], bool> sender = send;
       AsyncCallback callback = ar =>
       {
         try {
-          sender.EndInvoke (ar);
+          var sent = sender.EndInvoke (ar);
           if (completed != null)
-            completed ();
+            completed (sent);
         }
         catch (Exception ex)
         {
@@ -1098,15 +1105,15 @@ namespace WebSocketSharp
       sender.BeginInvoke (opcode, data, callback, null);
     }
 
-    private void sendAsync (Opcode opcode, Stream stream, Action completed)
+    private void send (Opcode opcode, Stream stream, Action<bool> completed)
     {
-      Action<Opcode, Stream> sender = send;
+      Func<Opcode, Stream, bool> sender = send;
       AsyncCallback callback = ar =>
       {
         try {
-          sender.EndInvoke (ar);
+          var sent = sender.EndInvoke (ar);
           if (completed != null)
-            completed ();
+            completed (sent);
         }
         catch (Exception ex)
         {
@@ -1585,127 +1592,62 @@ namespace WebSocketSharp
     /// <summary>
     /// Sends a binary <paramref name="data"/> using the WebSocket connection.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// An array of <see cref="byte"/> that contains a binary data to send.
     /// </param>
     public void Send (byte[] data)
     {
-      var msg = _readyState.CheckIfOpen () ?? data.CheckIfValidSendData ();
-      if (msg != null)
-      {
-        _logger.Error (msg);
-        error (msg);
-
-        return;
-      }
-
-      if (data.LongLength <= FragmentLength)
-        send (Opcode.BINARY, data);
-      else
-        send (Opcode.BINARY, new MemoryStream (data));
+      Send (data, null);
     }
 
     /// <summary>
     /// Sends a text <paramref name="data"/> using the WebSocket connection.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// A <see cref="string"/> that contains a text data to send.
     /// </param>
     public void Send (string data)
     {
-      var msg = _readyState.CheckIfOpen () ?? data.CheckIfValidSendData ();
-      if (msg != null)
-      {
-        _logger.Error (msg);
-        error (msg);
-
-        return;
-      }
-
-      var rawData = Encoding.UTF8.GetBytes (data);
-      if (rawData.LongLength <= FragmentLength)
-        send (Opcode.TEXT, rawData);
-      else
-        send (Opcode.TEXT, new MemoryStream (rawData));
+      Send (data, null);
     }
 
     /// <summary>
-    /// Sends a binary data using the WebSocket connection.
+    /// Sends a binary data from the specified <see cref="FileInfo"/>
+    /// using the WebSocket connection.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="file">
-    /// A <see cref="FileInfo"/> that contains a binary data to send.
+    /// A <see cref="FileInfo"/> from which contains a binary data to send.
     /// </param>
     public void Send (FileInfo file)
     {
-      var msg = _readyState.CheckIfOpen () ??
-                (file == null ? "'file' must not be null." : null);
-
-      if (msg != null)
-      {
-        _logger.Error (msg);
-        error (msg);
-
-        return;
-      }
-
-      send (Opcode.BINARY, file.OpenRead ());
-    }
-
-    /// <summary>
-    /// Sends a binary data from the specified <see cref="Stream"/> using the WebSocket connection.
-    /// </summary>
-    /// <param name="stream">
-    /// A <see cref="Stream"/> object from which contains a binary data to send.
-    /// </param>
-    /// <param name="length">
-    /// An <see cref="int"/> that contains the number of bytes to send.
-    /// </param>
-    /// <param name="dispose">
-    /// <c>true</c> if <paramref name="stream"/> is disposed after a binary data read;
-    /// otherwise, <c>false</c>.
-    /// </param>
-    public void Send (Stream stream, int length, bool dispose)
-    {
-      byte [] data = null;
-      int readLen = 0;
-      var msg = _readyState.CheckIfOpen () ??
-                stream.CheckIfCanRead () ??
-                (length < 1 ? "'length' must be greater than 0." : null) ??
-                ((readLen = (data = stream.ReadBytes (length)).Length) == 0
-                   ? "A data cannot be read from 'stream'." : null);
-
-      if (msg != null)
-      {
-        _logger.Error (msg);
-        error (msg);
-
-        return;
-      }
-
-      if (readLen != length)
-        _logger.Warn (String.Format (
-          "A data with 'length' cannot be read from 'stream'.\nexpected: {0} actual: {1}", length, readLen));
-
-      if (dispose)
-        stream.Dispose ();
-
-      if (readLen <= FragmentLength)
-        send (Opcode.BINARY, data);
-      else
-        send (Opcode.BINARY, new MemoryStream (data));
+      Send (file, null);
     }
 
     /// <summary>
-    /// Sends a binary <paramref name="data"/> asynchronously using the WebSocket connection.
+    /// Sends a binary <paramref name="data"/> using the WebSocket connection.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// An array of <see cref="byte"/> that contains a binary data to send.
     /// </param>
     /// <param name="completed">
-    /// An <see cref="Action"/> delegate that references the method(s) called when
-    /// the asynchronous operation completes.
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is complete
+    /// successfully; otherwise, <c>false</c>.
     /// </param>
-    public void SendAsync (byte [] data, Action completed)
+    public void Send (byte [] data, Action<bool> completed)
     {
       var msg = _readyState.CheckIfOpen () ?? data.CheckIfValidSendData ();
       if (msg != null)
@@ -1717,22 +1659,27 @@ namespace WebSocketSharp
       }
 
       if (data.LongLength <= FragmentLength)
-        sendAsync (Opcode.BINARY, data, completed);
+        send (Opcode.BINARY, data, completed);
       else
-        sendAsync (Opcode.BINARY, new MemoryStream (data), completed);
+        send (Opcode.BINARY, new MemoryStream (data), completed);
     }
 
     /// <summary>
-    /// Sends a text <paramref name="data"/> asynchronously using the WebSocket connection.
+    /// Sends a text <paramref name="data"/> using the WebSocket connection.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="data">
     /// A <see cref="string"/> that contains a text data to send.
     /// </param>
     /// <param name="completed">
-    /// An <see cref="Action"/> delegate that references the method(s) called when
-    /// the asynchronous operation completes.
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is complete
+    /// successfully; otherwise, <c>false</c>.
     /// </param>
-    public void SendAsync (string data, Action completed)
+    public void Send (string data, Action<bool> completed)
     {
       var msg = _readyState.CheckIfOpen () ?? data.CheckIfValidSendData ();
       if (msg != null)
@@ -1745,22 +1692,28 @@ namespace WebSocketSharp
 
       var rawData = Encoding.UTF8.GetBytes (data);
       if (rawData.LongLength <= FragmentLength)
-        sendAsync (Opcode.TEXT, rawData, completed);
+        send (Opcode.TEXT, rawData, completed);
       else
-        sendAsync (Opcode.TEXT, new MemoryStream (rawData), completed);
+        send (Opcode.TEXT, new MemoryStream (rawData), completed);
     }
 
     /// <summary>
-    /// Sends a binary data asynchronously using the WebSocket connection.
+    /// Sends a binary data from the specified <see cref="FileInfo"/>
+    /// using the WebSocket connection.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="file">
-    /// A <see cref="FileInfo"/> that contains a binary data to send.
+    /// A <see cref="FileInfo"/> from which contains a binary data to send.
     /// </param>
     /// <param name="completed">
-    /// An <see cref="Action"/> delegate that references the method(s) called when
-    /// the asynchronous operation completes.
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is complete
+    /// successfully; otherwise, <c>false</c>.
     /// </param>
-    public void SendAsync (FileInfo file, Action completed)
+    public void Send (FileInfo file, Action<bool> completed)
     {
       var msg = _readyState.CheckIfOpen () ??
                 (file == null ? "'file' must not be null." : null);
@@ -1773,13 +1726,38 @@ namespace WebSocketSharp
         return;
       }
 
-      sendAsync (Opcode.BINARY, file.OpenRead (), completed);
+      send (Opcode.BINARY, file.OpenRead (), completed);
     }
 
     /// <summary>
-    /// Sends a binary data asynchronously from the specified <see cref="Stream"/>
+    /// Sends a binary data from the specified <see cref="Stream"/>
     /// using the WebSocket connection.
     /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
+    /// <param name="stream">
+    /// A <see cref="Stream"/> object from which contains a binary data to send.
+    /// </param>
+    /// <param name="length">
+    /// An <see cref="int"/> that contains the number of bytes to send.
+    /// </param>
+    /// <param name="dispose">
+    /// <c>true</c> if <paramref name="stream"/> is disposed after a binary data read;
+    /// otherwise, <c>false</c>.
+    /// </param>
+    public void Send (Stream stream, int length, bool dispose)
+    {
+      Send (stream, length, dispose, null);
+    }
+
+    /// <summary>
+    /// Sends a binary data from the specified <see cref="Stream"/>
+    /// using the WebSocket connection.
+    /// </summary>
+    /// <remarks>
+    /// This method does not wait for the send to be complete.
+    /// </remarks>
     /// <param name="stream">
     /// A <see cref="Stream"/> object from which contains a binary data to send.
     /// </param>
@@ -1791,10 +1769,12 @@ namespace WebSocketSharp
     /// otherwise, <c>false</c>.
     /// </param>
     /// <param name="completed">
-    /// An <see cref="Action"/> delegate that references the method(s) called when
-    /// the asynchronous operation completes.
+    /// An Action&lt;bool&gt; delegate that references the method(s) called when
+    /// the send is complete.
+    /// A <see cref="bool"/> passed to this delegate is <c>true</c> if the send is complete
+    /// successfully; otherwise, <c>false</c>.
     /// </param>
-    public void SendAsync (Stream stream, int length, bool dispose, Action completed)
+    public void Send (Stream stream, int length, bool dispose, Action<bool> completed)
     {
       var msg = _readyState.CheckIfOpen () ??
                 stream.CheckIfCanRead () ??
@@ -1829,10 +1809,12 @@ namespace WebSocketSharp
         if (dispose)
           stream.Dispose ();
 
-        if (readLen <= FragmentLength)
-          sendAsync (Opcode.BINARY, data, completed);
-        else
-          sendAsync (Opcode.BINARY, new MemoryStream (data), completed);
+        var sent = readLen <= FragmentLength
+                 ? send (Opcode.BINARY, data)
+                 : send (Opcode.BINARY, new MemoryStream (data));
+
+        if (completed != null)
+          completed (sent);
       };
 
       Action<Exception> exception = ex =>