ASP.NET MemberShip getting user info by UserId

[mazdotnet]

Hi,

I'm trying to get the 'User Information' by using the UserId and it
doesn't work.

This works,

MembershipUser membershipUser = Membership.GetUser("username");
tbxUsername.Text = membershipUser.UserName;
tbxEmail.Text = membershipUser.Email;

However, I need to grab this information by UserId (ProviderUserKey)
and not by Username. But I can't get it to work. Any suggestions?

Thx
M.