membership.deleteuser() returning false

Question

I am trying to delete an asp.net user from all tables.
When I call:

bool isDeleted = Membership.DeleteUser(username, true);

isDeleted is being set to false;

Is there a way to tell why it is not deleting the user?

Answer 1

I found another reason why the user could not be deleted:
it happens also if you change (in the aspnet_Users) the UserName but not the LoweredUserName accordingly.
At least this is what happened to me:
as soon that I changed also the LoweredUserName I could finally delete the user.