//Payment
        public static void processPayment(Bank bank, string accountNumber, DateTime timeStamp)
        {
            //Generate random payment [1,00-199,99] EUR
            decimal paymentSum = -((decimal)_rng.Next(1, 200) + (decimal)_rng.Next(0, 100) / 100);

            bank.AddTransaction(accountNumber, paymentSum, timeStamp);
        }
 //Deposit
 public static void processDeposit(Bank bank, string accountNumber, DateTime timeStamp)
 {
     //Generate random deposit [1800,00-2800,00] EUR
     bank.AddTransaction(accountNumber, _rng.Next(1800, 2801), timeStamp);
 }