public static void TransactionAction(Atm atm)
        {
            for (int i = 0; i < atm.Customers.Count; i++)
            {
                Console.WriteLine(" ");
                Console.WriteLine("What would you like to do:");
                Console.WriteLine("1) Check balance\n2) Cash withdrawal\n3) Cash deposit");
                string pickAction = Console.ReadLine();
                Int32.TryParse(pickAction, out int choice);
                switch (choice)
                {
                case 1:

                    Console.WriteLine($"Your balance is: {atm.Customers[i].Balance}");
                    break;

                case 2:
                    Console.WriteLine("Enter how much you would like to withdrawl:");
                    string ammount = Console.ReadLine();
                    Int32.TryParse(ammount, out int cashAmmount);
                    if (cashAmmount <= atm.Customers[i].Balance)
                    {
                        Console.WriteLine($"You have successfully withdrown {cashAmmount}");
                        Console.WriteLine($"You have {atm.Customers[i].Balance = atm.Customers[i].Balance - cashAmmount} left on your account");
                        break;
                    }
                    else if (cashAmmount > atm.Customers[i].Balance)
                    {
                        Console.WriteLine("You don't have the desired ammount on your card");
                    }
                    break;

                case 3:
                    Console.WriteLine("How much would you like to deposit?");
                    string deposit = Console.ReadLine();
                    Int32.TryParse(deposit, out int cashDeposit);
                    if (cashDeposit != 0)
                    {
                        Console.WriteLine($"You now have {atm.Customers[i].Balance = atm.Customers[i].Balance + cashDeposit} on your card");
                    }
                    break;

                case 4:
                {
                    Console.WriteLine("Thank you for using this ATM machine");
                    break;
                }
                }
            }
        }
 public static void IsCardAndPinValid(Atm atm, long cardNumber, int pinNum)
 {
     for (int i = 0; i < atm.Customers.Count; i++)
     {
         if ((atm.Customers[i].CardNumber == cardNumber) && (atm.Customers[i].PinNumber == pinNum))
         {
             Console.WriteLine($"Wellcome {atm.Customers[i].Name}");
             break;
         }
         else
         {
             Console.WriteLine("Please try again");
             break;
         }
     }
 }