diff --git a/Example3/Program.cs b/Example3/Program.cs
index a54dcb83..4c811dde 100644
--- a/Example3/Program.cs
+++ b/Example3/Program.cs
@@ -45,7 +45,9 @@ namespace Example3
 
       _httpsv.AddWebSocketService<Echo> ("/Echo");
       _httpsv.AddWebSocketService<Chat> ("/Chat");
-      //_httpsv.AddWebSocketService<Chat> ("/Chat", () => new Chat ("Anon#"));
+      //_httpsv.AddWebSocketService<Chat> (
+      //  "/Chat",
+      //  () => new Chat ("Anon#") { Protocol = "chat" });
 
       _httpsv.Start ();
       if (_httpsv.IsListening) {
diff --git a/websocket-sharp/Server/IWebSocketSession.cs b/websocket-sharp/Server/IWebSocketSession.cs
index 051d1dfc..7d143b14 100644
--- a/websocket-sharp/Server/IWebSocketSession.cs
+++ b/websocket-sharp/Server/IWebSocketSession.cs
@@ -32,7 +32,7 @@ using WebSocketSharp.Net.WebSockets;
 namespace WebSocketSharp.Server
 {
   /// <summary>
-  /// Exposes the access to the session to the WebSocket service.
+  /// Exposes the access to the session information in the WebSocket service.
   /// </summary>
   public interface IWebSocketSession
   {
@@ -41,7 +41,7 @@ namespace WebSocketSharp.Server
     /// </summary>
     /// <value>
     /// A <see cref="WebSocketContext"/> that represents the WebSocket connection
-    /// request.
+    /// request information.
     /// </value>
     WebSocketContext Context { get; }
 
@@ -54,11 +54,19 @@ namespace WebSocketSharp.Server
     string ID { get; }
 
     /// <summary>
-    /// Gets the time that the session has been started.
+    /// Gets the subprotocol used on the WebSocket connection.
+    /// </summary>
+    /// <value>
+    /// A <see cref="string"/> that represents the subprotocol if any.
+    /// </value>
+    string Protocol { get; }
+
+    /// <summary>
+    /// Gets the time that the session has started.
     /// </summary>
     /// <value>
     /// A <see cref="DateTime"/> that represents the time that the session has
-    /// been started.
+    /// started.
     /// </value>
     DateTime StartTime { get; }
 
@@ -66,7 +74,7 @@ namespace WebSocketSharp.Server
     /// Gets the state of the WebSocket connection.
     /// </summary>
     /// <value>
-    /// One of the <see cref="WebSocketState"/> values that indicate the state of
+    /// One of the <see cref="WebSocketState"/> enum values, indicates the state of
     /// the WebSocket connection.
     /// </value>
     WebSocketState State { get; }