diff --git a/websocket-sharp/Server/WebSocketServiceManager.cs b/websocket-sharp/Server/WebSocketServiceManager.cs
index 3ee37b5c..d6453165 100644
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@@ -554,100 +554,6 @@ namespace WebSocketSharp.Server
       }
     }
 
-    /// <summary>
-    /// Sends the data from <paramref name="stream"/> asynchronously to
-    /// every client in the WebSocket services.
-    /// </summary>
-    /// <remarks>
-    ///   <para>
-    ///   The data is sent as the binary data.
-    ///   </para>
-    ///   <para>
-    ///   This method does not wait for the send to be complete.
-    ///   </para>
-    /// </remarks>
-    /// <param name="stream">
-    /// A <see cref="Stream"/> instance from which to read the data to send.
-    /// </param>
-    /// <param name="length">
-    /// An <see cref="int"/> that specifies the number of bytes to send.
-    /// </param>
-    /// <param name="completed">
-    ///   <para>
-    ///   An <see cref="Action"/> delegate or <see langword="null"/>
-    ///   if not needed.
-    ///   </para>
-    ///   <para>
-    ///   The delegate invokes the method called when the send is complete.
-    ///   </para>
-    /// </param>
-    /// <exception cref="InvalidOperationException">
-    /// The current state of the manager is not Start.
-    /// </exception>
-    /// <exception cref="ArgumentNullException">
-    /// <paramref name="stream"/> is <see langword="null"/>.
-    /// </exception>
-    /// <exception cref="ArgumentException">
-    ///   <para>
-    ///   <paramref name="stream"/> cannot be read.
-    ///   </para>
-    ///   <para>
-    ///   -or-
-    ///   </para>
-    ///   <para>
-    ///   <paramref name="length"/> is less than 1.
-    ///   </para>
-    ///   <para>
-    ///   -or-
-    ///   </para>
-    ///   <para>
-    ///   No data could be read from <paramref name="stream"/>.
-    ///   </para>
-    /// </exception>
-    [Obsolete ("This method will be removed.")]
-    public void BroadcastAsync (Stream stream, int length, Action completed)
-    {
-      if (_state != ServerState.Start) {
-        var msg = "The current state of the manager is not Start.";
-        throw new InvalidOperationException (msg);
-      }
-
-      if (stream == null)
-        throw new ArgumentNullException ("stream");
-
-      if (!stream.CanRead) {
-        var msg = "It cannot be read.";
-        throw new ArgumentException (msg, "stream");
-      }
-
-      if (length < 1) {
-        var msg = "Less than 1.";
-        throw new ArgumentException (msg, "length");
-      }
-
-      var bytes = stream.ReadBytes (length);
-
-      var len = bytes.Length;
-      if (len == 0) {
-        var msg = "No data could be read from it.";
-        throw new ArgumentException (msg, "stream");
-      }
-
-      if (len < length) {
-        _log.Warn (
-          String.Format (
-            "Only {0} byte(s) of data could be read from the stream.",
-            len
-          )
-        );
-      }
-
-      if (len <= WebSocket.FragmentLength)
-        broadcastAsync (Opcode.Binary, bytes, completed);
-      else
-        broadcastAsync (Opcode.Binary, new MemoryStream (bytes), completed);
-    }
-
     /// <summary>
     /// Sends a ping to every client in the WebSocket services.
     /// </summary>