public void OnChecked()
        {
            Canvas c = new Canvas();
            OnCheckedRadioButton b1 = new OnCheckedRadioButton();

            c.Children.Add(b1);
            b1.IsChecked = true;
            OnCheckedRadioButton b2 = new OnCheckedRadioButton();

            c.Children.Add(b2);
            b2.IsChecked = true;
            Assert.IsTrue(b1.IsChecked.Value);
        }
		public void OnChecked ()
		{
			Canvas c = new Canvas ();
			OnCheckedRadioButton b1 = new OnCheckedRadioButton ();
			c.Children.Add (b1);
			b1.IsChecked = true;
			OnCheckedRadioButton b2 = new OnCheckedRadioButton ();
			c.Children.Add (b2);
			b2.IsChecked = true;
			Assert.IsTrue (b1.IsChecked.Value);
		}