static void Main(string[] args) { BankServiceClient proxy = new BankServiceClient(new System.ServiceModel.InstanceContext(new CallbackHandler())); Console.WriteLine("Enter name:"); if (!proxy.IsLogIn(Console.ReadLine())) { return; } Console.WriteLine("Enter money:"); double money = Convert.ToDouble(Console.ReadLine()); while (money > 0) { proxy.PutMoney(money); Console.WriteLine("Balance: " + proxy.GetBalance()); Console.WriteLine("Enter money:"); money = Convert.ToDouble(Console.ReadLine()); } }