private void ShowLoading()
{
Dispatcher.Invoke(
new Action(delegate
{
lblLoginAnimation.Visibility = Visibility.Visible;
Storyboard sbdHideLoading = (Storyboard)FindResource("AnimatedDotLabel");
sbdHideLoading.Begin();
//lblLoginAnimation.
//lblError.Content = _err;
}), System.Windows.Threading.DispatcherPriority.Normal);
}