[Fix] It must be the name of the parameter

websocket-sharp/WebSocket.cs

@@ -615,12 +615,12 @@ namespace WebSocketSharp
           Uri uri;
           if (!Uri.TryCreate (value, UriKind.Absolute, out uri)) {
             msg = "Not an absolute URI string.";
-            throw new ArgumentException (msg, value);
+            throw new ArgumentException (msg, "value");
           }
 
           if (uri.Segments.Length > 1) {
             msg = "It includes the path segments.";
-            throw new ArgumentException (msg, value);
+            throw new ArgumentException (msg, "value");
           }
         }