public frmMainMenu(User user)
 {
     InitializeComponent();
     billRepository = new BillRepository();
     userRepository = new UserRepository();
     logOutExpanded = false;
     currentUser    = user;
     idBill         = billRepository.AddNewBill(currentUser);
     try
     {
         if (threadLogin.ThreadState == ThreadState.Running)
         {
             threadLogin.Abort();
         }
     }
     catch (NullReferenceException)
     {
     }
 }