There's a little thing called MSDN, which contains documentation on all the .Net framework classes. If you'd take the time to look up the piece of code you wrote above you'd realise that Assembly.GetExecutingAssembly() returns a System.Reflection.Assembly class.
Take a look at the following page and see if you can guess
which property might be the one you want:
/- Sam Judson : Wrox Technical Editor -/