public static void ProcessResult(IAsyncResult token)
{
funcBinary func = (funcBinary)token.AsyncState;
int res = func.EndInvoke(token);
Console.WriteLine(res);
}
static int SquareUsingDelegateParameter(int x, int y, funcBinary binary)
{
int a = x * x;
int b = y * y;
int res = binary.Invoke(a, b);
return(res);
}
static void Main2(string[] args)
{
Myclass obj = new Myclass();
funcBinary x = null;
Random r = new Random();
int num = r.Next(1, 6);
switch (num)
{
case 1:
//we are saving the function context inside the delegate variable
x = new funcBinary(obj.add); //upto .net 1.1
break;
case 2:
x = obj.mul;
break;
case 3:
x = obj.sub;
break;
case 4:
x = obj.div;
break;
case 5:
x = obj.powr;
break;
}
//int res = x.Invoke(3, 4);
//Console.WriteLine("result :" + res);
x.BeginInvoke(3, 4, ProcessResult, x);
Console.WriteLine("Continuing with the usual task....");
Console.ReadKey();
}
