My Development Notes

http://www.idevforfun.com/index.php/2010/01/10/windows-ui-threading/

/// <summary>
/// Something that updates a UI control that 
/// might be called from a background thread 
/// </summary>
/// <param name="progress"></param>
private void UpdateProgressBar(int progress)
{
     //Wrap any code that updates a UI control in this anonymous delegate
     Func<int, object> work = delegate(int progressCount)
     {
        if (progressCount < 0) progressCount = 0;
        if (progressCount > 100) progressCount = 100;
        progressBar1.Value = progressCount;
        if (progressCount == 100) lbl.Text = "Done!";
        return null;
     };

     //Check if we are running on a background thread and if so use Invoke
     //otherwise just call the delegate
     if (this.InvokeRequired) Invoke(work, progress);
     else work(progress);
}

http://www.shawinnes.com/post/Thread-Safe-DotNet-UI-Updates.aspx

public static class ThreadSafeInvokeExtension
{
    public static void ThreadSafeInvoke<T>(this T @control, Action<T> toPerform) where T : ISynchronizeInvoke
    {
        if (@control.InvokeRequired)
            @control.Invoke(toPerform, new object[] { @control });
        else
            toPerform(@control);
    }
}

To use the extension method just do something like this:

textBox1.ThreadSafeInvoke(box => box.Text = value);