public CustomerScreen()
 {
     menuSystem = MenuSystem.GetInstance();
     noOfPaths  = 3;
 }
 public CartMain()
 {
     menuSystem = MenuSystem.GetInstance();
     noOfPaths  = 3;
 }
 public LoginMain()
 {
     menuSystem = MenuSystem.GetInstance();
 }
 public MainScreen()
 {
     menuSystem = MenuSystem.GetInstance();
     noOfPaths  = 3;
 }
 public ManagerMain()
 {
     menuSystem = MenuSystem.GetInstance();
     noOfPaths  = 5;
 }