public override void OnApplyTemplate() { var timeSpan = new TimeSpan (0,0,0,1); m_first = GetTemplateChild ("REQUIRED_FOR_FIRST_ANIMATION") as PresentingSlideControl; m_second = GetTemplateChild ("REQUIRED_FOR_SECOND_ANIMATION") as PresentingSlideControl; if (m_first != null) { m_first.Opacity = 0; m_showFirstStoryboard = new Storyboard (); m_showFirstStoryboard.AnimateProperty ( m_first, OpacityProperty, timeSpan, 1.0 ); m_hideFirstStoryboard = new Storyboard (); m_hideFirstStoryboard.AnimateProperty ( m_first, OpacityProperty, timeSpan, 0.0 ); } if (m_second != null) { m_second.Opacity = 0; m_showSecondStoryboard = new Storyboard (); m_showSecondStoryboard.AnimateProperty ( m_second, OpacityProperty, timeSpan, 1.0 ); m_hideSecondStoryboard = new Storyboard (); m_hideSecondStoryboard.AnimateProperty ( m_second, OpacityProperty, timeSpan, 0.0 ); } base.OnApplyTemplate (); }