Frame element is wrapping window with handle, thus it can not have animated opacity. However, you can create VisualBrush over Frame and Animate it
Loading User Information from Channel 9
Something went wrong getting user information from Channel 9
Loading User Information from MSDN
Something went wrong getting user information from MSDN
Loading Visual Studio Achievements
Something went wrong getting the Visual Studio Achievements
Frame element is wrapping window with handle, thus it can not have animated opacity. However, you can create VisualBrush over Frame and Animate it