c# equivalent of My.Application

I'm convert vb.net to c# and need to find out how to pass a reference of the current windows application.  In vb.net it was My.application.
I have have found one item in msdn which is System.Window.Applicaiton.Current.  I'm not sure if this is the same.  However, it is only available in Silverlight

Can anyone tell me how i can get a reference to the application so that I can pass it as a reference ?

regards

ErickTreetops