With Deep Zoom Composer you can easily create a deep zoom image from your high resoluting images and retrieve a similiar effect as the one given at Hard Rock Cafè’s memorabilia. If you like more details on how this actually works read a series of blog entries found here written by Wilfred Pinto.

This simple win-form application creates a thread (from now on called the taskrunner) that is to perform two separate tasks. Each task is run in a separate thread and signals to the taskrunner when they are finished. The taskrunner will wait for a predefined timeout value if given to the WaitHandle.WaitAll method.

Happy threading!

public partial class ThreadPoolWaitAllForm : Form
{
    public ThreadPoolWaitAllForm()
    {
        InitializeComponent();

        /* WaitHandle.WaitAll is not allowed on STA-thread,
         * hence a thread must be created to
         * perform the work needed. */
        ThreadPool.QueueUserWorkItem(
            delegate { PerformWork(); }
            );
    }

    private void PerformWork()
    {
        /* initialize a waithandle for each thread,
         * such that it can signal when
         * it's work is done. */
        ManualResetEvent[] waitHandlers =
            new ManualResetEvent[2];
        waitHandlers[0] =
            new ManualResetEvent(false);
        waitHandlers[1] =
            new ManualResetEvent(false);            

        /* queue the work to be done,
         * pass in reference to the waithandle
         * assigned to the thread */
        ThreadPool.QueueUserWorkItem(
            delegate { FirstJob(waitHandlers[0]); }
            );
        ThreadPool.QueueUserWorkItem(
            delegate { SecondJob(waitHandlers[1]); }
            );

        /* wait for all threads */
        int timeOut = 10000;
        WaitHandle.WaitAll(waitHandlers, timeOut);

        MessageBox.Show("Done with work");
    }

    private void FirstJob(ManualResetEvent signal)
    {
        Thread.Sleep(1000);
        signal.Set();
    }

    private void SecondJob(ManualResetEvent signal)
    {
        Thread.Sleep(1000);
        signal.Set();
    }
}

Hope to see you around!