diff --git a/websocket-sharp/Server/WebSocketServer.cs b/websocket-sharp/Server/WebSocketServer.cs
index 85f6e758..6621718d 100644
--- a/websocket-sharp/Server/WebSocketServer.cs
+++ b/websocket-sharp/Server/WebSocketServer.cs
@@ -1116,6 +1116,63 @@ namespace WebSocketSharp.Server
       _services.AddService<TBehaviorWithNew> (path, null);
     }
 
+    /// <summary>
+    /// Adds a WebSocket service with the specified behavior,
+    /// <paramref name="path"/>, and <paramref name="initializer"/>.
+    /// </summary>
+    /// <remarks>
+    /// <paramref name="path"/> is converted to a URL-decoded string and
+    /// / is trimmed from the end of the converted string if any.
+    /// </remarks>
+    /// <param name="path">
+    /// A <see cref="string"/> that represents an absolute path to
+    /// the service to add.
+    /// </param>
+    /// <param name="initializer">
+    /// An <c>Action&lt;TBehaviorWithNew&gt;</c> delegate that invokes
+    /// the method used to initialize a new session instance for
+    /// the service or <see langword="null"/> if not needed.
+    /// </param>
+    /// <typeparam name="TBehaviorWithNew">
+    /// The type of the behavior for the service. It must inherit
+    /// the <see cref="WebSocketBehavior"/> class and it must have
+    /// a public parameterless constructor.
+    /// </typeparam>
+    /// <exception cref="ArgumentNullException">
+    /// <paramref name="path"/> is <see langword="null"/>.
+    /// </exception>
+    /// <exception cref="ArgumentException">
+    ///   <para>
+    ///   <paramref name="path"/> is empty.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   <paramref name="path"/> is not an absolute path.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   <paramref name="path"/> includes either or both
+    ///   query and fragment components.
+    ///   </para>
+    ///   <para>
+    ///   -or-
+    ///   </para>
+    ///   <para>
+    ///   <paramref name="path"/> is already in use.
+    ///   </para>
+    /// </exception>
+    public void AddWebSocketService<TBehaviorWithNew> (
+      string path, Action<TBehaviorWithNew> initializer
+    )
+      where TBehaviorWithNew : WebSocketBehavior, new ()
+    {
+      _services.AddService<TBehaviorWithNew> (path, initializer);
+    }
+
     /// <summary>
     /// Removes a WebSocket service with the specified <paramref name="path"/>.
     /// </summary>