Question

I thought that if I wrap the EndInvoke call with a try catch if an error is thrown then my catch block would handle it? I must being doing something wrong??? Has to be user error, just not sure what?

EDIT:
I get the “Exception was unhandled by user code” being thrown when I run this which is stopping the application. If I step through the code I see that and then it will go to the catch block. But, I would expect the catch block to handle this and not see the unhandled exception that is stopping the application?

Any suggestions appreciated.

class Program
{

    static void Main(string[] args)
    {


       Action myMethod = new Action(Program.FooOneSecond);

        Go("Go Method");

        IAsyncResult tag =
            myMethod.BeginInvoke(null, "passing some state");

        try
        {
            myMethod.EndInvoke(tag);
        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message);
        }

        string strState = (string)tag.AsyncState;

        Console.WriteLine("State When Calling EndInvoke: "
            + tag.AsyncState.ToString());


        Console.Read();
    }

    static int Work(string s) { return s.Length; throw null; }

    static void Go(string s) 
    {
        Console.WriteLine(s);
    }

    static void FooOneSecond()
    {
        // sleep for one second!
        Thread.Sleep(1000);
        // throw an exception
        throw new Exception("Exception from FooOneSecond");
    } 
}

Answer 1

I just ran your code and the exception gets caught every time…