private async void OnWebNavigationCompleted(Windows.UI.Xaml.Controls.WebView sender, Windows.UI.Xaml.Controls.WebViewNavigationCompletedEventArgs args)
{
while (NotificationIds.Count > 0)
{
Context.HideProgress(NotificationIds[0]);
NotificationIds.RemoveAt(0);
}
if (!args.Uri.ToString().StartsWith(VkAuthorization.GetRedirectUrl()))
{
return;
}
await TryFinishAuthorizationAsync(args.Uri);
}