public void CrossDissolve ()
		{
			var vc = new DogViewController {
				ModalTransitionStyle = UIModalTransitionStyle.CrossDissolve,
				ModalPresentationStyle = UIModalPresentationStyle.FormSheet,
			};
			PresentViewController (vc, true, null);
		}
		public void CoverVertical ()
		{
			var vc = new DogViewController {
				ModalTransitionStyle = UIModalTransitionStyle.CoverVertical,
				ModalPresentationStyle = UIModalPresentationStyle.FormSheet,
			};
			PresentViewController (vc, true, null);
		}
		public void FlipHorizontal ()
		{
			var vc = new DogViewController {
				ModalTransitionStyle = UIModalTransitionStyle.FlipHorizontal,
				ModalPresentationStyle = UIModalPresentationStyle.FormSheet,
			};
			PresentViewController (vc, true, null);
		}