public void HideProgressIndicator()
{
DoubleAnimation fadeOut = Animations.FadeOut;
fadeOut.From = ProgressIndicator.Opacity;
ProgressIndicator.BeginAnimation(OpacityProperty, fadeOut);
}
public void ShowProgressIndicator()
{
DoubleAnimation fadeIn = Animations.FadeIn;
fadeIn.From = ProgressIndicator.Opacity;
ProgressIndicator.BeginAnimation(OpacityProperty, fadeIn);
}