public static class ControlThreadingHelper
	{
		public static void InvokeControlAction<t>(t control, Action action) where t : Control
		{
			if (control.InvokeRequired)
				control.Invoke(new Action<t, Action>(InvokeControlAction), new object[] { control, action });
			else
				action();
		}
	}
	public static class ControlThreadingExtensions
	{
		public static void Invoke<t>(this t control, Action action) where t : Control
		{
			ControlThreadingHelper.InvokeControlAction<t>(control, action);
		}
	}