diff --git a/websocket-sharp/Ext.cs b/websocket-sharp/Ext.cs
index 7ba04509..83514fce 100644
--- a/websocket-sharp/Ext.cs
+++ b/websocket-sharp/Ext.cs
@@ -198,18 +198,19 @@ namespace WebSocketSharp
     }
 
     /// <summary>
-    /// Determines whether the specified <see cref="string"/> contains any of characters in
+    /// Determines whether the specified string contains any of characters in
     /// the specified array of <see cref="char"/>.
     /// </summary>
     /// <returns>
-    /// <c>true</c> if <paramref name="value"/> contains any of <paramref name="anyOf"/>;
-    /// otherwise, <c>false</c>.
+    /// <c>true</c> if <paramref name="value"/> contains any of characters in
+    /// <paramref name="anyOf"/>; otherwise, <c>false</c>.
     /// </returns>
     /// <param name="value">
     /// A <see cref="string"/> to test.
     /// </param>
     /// <param name="anyOf">
-    /// An array of <see cref="char"/> that contains characters to find.
+    /// An array of <see cref="char"/> that contains one or more characters to
+    /// seek.
     /// </param>
     internal static bool Contains (this string value, params char[] anyOf)
     {