static void Main(string[] args)
    {
        AuthSession  session  = new AuthSession();
        AuthSession2 session2 = new AuthSession2();

        DoStuff(session);
        DoStuff(session2);
        Console.WriteLine(session.username + " " + session.accessLevel);
        Console.WriteLine(session2.Username + " " + session2.AccessLevel);
    }
 static void DoStuff(AuthSession2 session)
 {
     session.Username    = "******";
     session.AccessLevel = "a";
 }