protected virtual void RaiseCompleted(ToastCompletedEventArgs e)
{
EventHandler <ToastCompletedEventArgs> handler = Completed;
if (handler != null)
{
handler(this, e);
}
}
private void OnAsyncToastCompleted(object sender, ToastCompletedEventArgs e)
{
this.Completed -= OnAsyncToastCompleted;
_showAsyncTaskCompletionSource.TrySetResult(e.DismissStatus);
}