.Net - Delegate BinaryOp Async

Del_BinOp_Async.cs

public delegate int BinOp(int a, int b);

public static class Del_BinOp_Async
{
    private static int DelegThreadMeth(int intData, int timeToSleep)
    {
        Console.WriteLine("DelegateThread Started.");
        System.Threading.Thread.Sleep(timeToSleep);
        Console.WriteLine("DelegateThread Finished.");
        return ++intData;
    }

    private static void MyIAsyncRezult(IAsyncResult iar)
    {
        if (iar == null)
            throw new ArgumentNullException("iar null!");
        BinOp boDel = iar.AsyncState as BinOp;
        System.Diagnostics.Trace.Assert(boDel != null, "Wrong object type!");
        var x = boDel.EndInvoke(iar);
        Console.WriteLine("Rezult : " + x);
    }

    public static void Test()
    {
        BinOp boDel = DelegThreadMeth;
        IAsyncResult iar = boDel.BeginInvoke(1, 3000, MyIAsyncRezult, boDel);
        while (true)
        {
            Console.Write(".");
            System.Threading.Thread.Sleep(50);
        }
    }
}