diff --git a/websocket-sharp/Server/WebSocketServiceManager.cs b/websocket-sharp/Server/WebSocketServiceManager.cs
index 707de74f..e8a105da 100644
--- a/websocket-sharp/Server/WebSocketServiceManager.cs
+++ b/websocket-sharp/Server/WebSocketServiceManager.cs
@@ -826,14 +826,14 @@ namespace WebSocketSharp.Server
     ///   A <c>Dictionary&lt;string, Dictionary&lt;string, bool&gt;&gt;</c>.
     ///   </para>
     ///   <para>
-    ///   It contains a collection of pairs of a service path and
+    ///   It represents a collection of pairs of a service path and
     ///   another collection of pairs of a session ID and a value
     ///   indicating whether a pong has been received within a time
-    ///   from a client.
+    ///   from its client.
     ///   </para>
     /// </returns>
     /// <param name="message">
-    /// A <see cref="string"/> that represents the message to send.
+    /// A <see cref="string"/> that represents a message to send.
     /// The size must be 125 bytes or less in UTF-8.
     /// </param>
     /// <exception cref="InvalidOperationException">