Resolve DesignMode for a User Control

namespace Controls {
	public static class Extensions {
		/// <summary>
		/// Extension method to return if the control is in design mode
		/// </summary>
		/// <param name="control">Control to examine</param>
		/// <returns>True if in design mode, otherwise false</returns>
		public static bool IsInDesignMode(this System.Windows.Forms.Control control) {
			return ResolveDesignMode(control);
		}

		/// <summary>
		/// Method to test if the control or it's parent is in design mode
		/// </summary>
		/// <param name="control">Control to examine</param>
		/// <returns>True if in design mode, otherwise false</returns>
		private static bool ResolveDesignMode(System.Windows.Forms.Control control) {
			System.Reflection.PropertyInfo designModeProperty;
			bool designMode;

			// Get the protected property
			designModeProperty = control.GetType().GetProperty("DesignMode", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic);

			// Get the controls DesignMode value
			designMode = (bool)designModeProperty.GetValue(control, null);

         // Test the parent if it exists
			if (control.Parent != null) {
				designMode |= ResolveDesignMode(control.Parent);
			}

			return designMode;
		}
	}
}