diff --git a/websocket-sharp/Server/WebSocketServer.cs b/websocket-sharp/Server/WebSocketServer.cs
index e8013094..74a6e455 100644
--- a/websocket-sharp/Server/WebSocketServer.cs
+++ b/websocket-sharp/Server/WebSocketServer.cs
@@ -1063,17 +1063,22 @@ namespace WebSocketSharp.Server
     }
 
     /// <summary>
-    /// Stops receiving the WebSocket handshake requests, and closes
-    /// the WebSocket connections with the specified <paramref name="code"/> and
-    /// <paramref name="reason"/>.
+    /// Stops receiving the WebSocket handshake requests,
+    /// and closes the WebSocket connections with the specified
+    /// <paramref name="code"/> and <paramref name="reason"/>.
     /// </summary>
+    /// <remarks>
+    /// This method does nothing if the server is not started,
+    /// it is shutting down, or it has already stopped.
+    /// </remarks>
     /// <param name="code">
-    /// One of the <see cref="CloseStatusCode"/> enum values that represents
-    /// the status code indicating the reason for the close.
+    /// One of the <see cref="CloseStatusCode"/> enum values.
+    /// It represents the status code indicating the reason for
+    /// the close.
     /// </param>
     /// <param name="reason">
-    /// A <see cref="string"/> that represents the reason for the close.
-    /// The size must be 123 bytes or less.
+    /// A <see cref="string"/> that represents the reason for
+    /// the close. The size must be 123 bytes or less in UTF-8.
     /// </param>
     public void Stop (CloseStatusCode code, string reason)
     {