Listing 13-15 - The Dim mu as MembershipUser statement causes an error in the following TryGetValue function. The variable mu is used before it is assigned a value and then the whole process fails.

This is the error that is thrown

{"Object reference not set to an instance of an object."}

This is the code where there is a problem

ReadUserFile()
Dim mu As MembershipUser
If (_MyUsers.TryGetValue(username, mu)) Then