WPF: Video in Vorschau anzeigen MediaElement,MediaPlayer

        private void add_Video_Image(string sFullname_Path_of_Video)

        {

            //----------------< add_Video_Image() >----------------

            ////*add a mediaElement to List

            MediaElement mediaElement = new MediaElement();

            mediaElement.LoadedBehavior = MediaState.Manual;

            mediaElement.ScrubbingEnabled = true;

            mediaElement.Source = new Uri(sFullname_Path_of_Video);

            mediaElement.Position += TimeSpan.FromSeconds(1);

            mediaElement.Play();

            mediaElement.Stop();

            //< add >

            panel_Images.Children.Add(mediaElement);

            //</ add >

            //----------------</ add_Video_Image() >----------------

        }