static void Main(string[] args)
{
InstanceContext instance = new InstanceContext(new CalculatorCallbackHandler());
CalculatorClient client = new CalculatorClient(instance);
Console.WriteLine("Calling AddTo");
client.AddTo(2);
Console.WriteLine("Calling SubtractFrom");
client.SubtractFrom(1);
Console.WriteLine("Calling MultiplyBy");
client.MultiplyBy(22);
Console.WriteLine("Calling DivideBy");
client.DivideBy(7);
Console.WriteLine("Calling GetResult");
client.GetResult();
Console.ReadLine();
//Closing the client gracefully closes the connection and cleans up resources
client.Close();
}