// Callback method
static void CallbackMethod(IAsyncResult asyncRes)
{
Console.WriteLine("Callback invoked");
AsyncResult ares = (AsyncResult)asyncRes;
SomeDelegateTwo delg = (SomeDelegateTwo)ares.AsyncDelegate;
int result = delg.EndInvoke(asyncRes);
Console.WriteLine(result);
}
static void Main(string[] args)
{
SomeDelegateTwo sd = SquareNumber; // Create delegate instance
Console.WriteLine("Before SquareNumber Method Invoke");
// async call
IAsyncResult asyncRes = sd.BeginInvoke(10, new AsyncCallback(CallbackMethod), null);
Console.WriteLine("Back to Main Method. Doing Extra Processing...");
Thread.Sleep(500);
Console.WriteLine("Main method processing completed");
Console.ReadLine();
}
