private void HideHeader()
{
var moveAnimation = new ThicknessAnimation(new Thickness(0, -60, 0, 0), TimeSpan.FromSeconds(0.25));
HeaderGrid.BeginAnimation(Grid.MarginProperty, moveAnimation);
var fadeInAnimation = new DoubleAnimation(1, TimeSpan.FromSeconds(0.25));
TrianglePoly.BeginAnimation(Polygon.OpacityProperty, fadeInAnimation);
}
private void ShowHeader()
{
var moveAnimation = new ThicknessAnimation(new Thickness(0, 30, 0, 0), TimeSpan.FromSeconds(0.25));
HeaderGrid.BeginAnimation(MarginProperty, moveAnimation);
moveAnimation = new ThicknessAnimation(new Thickness(0, 130, ChatGrid.Margin.Right, 30), TimeSpan.FromSeconds(0.25));
ChatGrid.BeginAnimation(MarginProperty, moveAnimation);
var fadeOutAnimation = new DoubleAnimation(0, TimeSpan.FromSeconds(0.25));
TrianglePoly.BeginAnimation(OpacityProperty, fadeOutAnimation);
}