Mutex in Silverlight

Are thre Mutex's that can be used in Silverlight? It seems the Mutex examples I have s开发者_如何转开发een work in window forms but not in silverlight.

In using System.Threading there does not seem to be a Mutex class in Silverlight.

There is no need for them. Use the lock keyword.

They are in Silverlight for Windows Phone 7.1 Mango.

http://msdn.microsoft.com/en-us/library/system.threading.mutex(v=VS.95).aspx

Old question, but for anyone else visiting here, Microsoft didn't include the Reference to mscorlib.extensions in the template project. So open your project, Right click on "References" in the solution explorer, pick "add Reference", and in the ".Net" tab there's mscorlib.Extensions. The Mutex class is in that extensions file.