Gotta wonder why you're setting the check variables the way you are.
I think this has as much to do with learning the framework classes as anything else. If you set the check variables like so:
string usernamecheck = "OMEGA";
string passwordcheck = "SWEE12";
and then do this comparison, you'll be gold:
if (usernamecheck == username.ToUpper() && passwordcheck == password.ToUpper())
{
}
Also, in your original code snippet, your comparison is incorrect because you're using a single "
&
" character (see my example above for the correct usage).