Waiting.cs

public static class Program
{
    private static readonly AutoResetEvent _event = new AutoResetEvent();    

    public static void Main()
    {
        Console.CancelKeyPress += (sender, arguments) =>
        {
            Console.WriteLine("Exiting...");

            Thread.Sleep(5000);

            _event.Set();
        };

        Console.WriteLine("Press Ctrl+C to exit...");

        _event.WaitOne();
    }
}