I am working on a silverlight RIA application and don't want the option to register or remember the user. Removing the register was stright forward, just collapse the links in the LoginForm.xaml form. The remember me option was not as stright forward, after some searching I found this, not sure it is the best way but it works.
In the LoginInfor.cs file remove the remember me property which generates an error in the ToLoginParameters function. In that function just change the function call so it is always true or false depending on need. Since I don't want it to remember I set it to false.
first test
second test
third test