I'm trying to use the method
Windows.System.UserProfile.UserInformation.GetPrincipalNameAsync()
to get Windows Live ID, but it returns an empty string, anyone knows why?
Thanks a lot.
I'm trying to use the method
Windows.System.UserProfile.UserInformation.GetPrincipalNameAsync()
to get Windows Live ID, but it returns an empty string, anyone knows why?
Thanks a lot.