How do I use Console.CancelKeyPress in .NET 4? (Works fine in .NET 3.5 and below)

Question

I am writing a Console app in C# 4 and want to gracefully cancel my program and Ctrl + C is pressed. The following code I have used many times before, but now when trying to use it in .NET 4, it seems a strange unhandled exception is occurring.

namespace ConsoleTest
{
    class Program
    {
        private static bool stop = false;

        static void Main(string[] args)
        {
            System.Console.TreatControlCAsInput = false;
            System.Console.CancelKeyPress += new ConsoleCancelEventHandler(Console_CancelKeyPress);

            while (!stop)
            {
                System.Console.WriteLine("waiting...");
                System.Threading.Thread.Sleep(1000);
            }
            System.Console.WriteLine("Press any key to exit...");
            System.Console.ReadKey(true);
        }

        static void Console_CancelKeyPress(object sender, ConsoleCancelEventArgs e)
        {
            stop = true;
            e.Cancel = true;
        }
    }
}

If I change the Target Framework to .NET 3.5, it works.

EDIT: It seems this person is seeing the same issue: http://johnwheatley.wordpress.com/2010/04/14/net-4-control-c-event-handler-broken/

Answer 1

This is a known issue on Microsoft Connect.

Note that it does work outside of the debugger.