Mediaplayer i C#

CSharp kode 

 private void FindFile_Click(object sender, EventArgs e)
         {
             OpenFileDialog ofd;
             ofd = new OpenFileDialog();
             ofd.AddExtension = true;
             ofd.DefaultExt = "*.*";
             ofd.Filter = "Media files (*.*) *.*";
             ofd.ShowDialog();
             try 
             { 
                MediaElement Sang = new MediaElement();
                Uri Spilsang = new Uri(ofd.FileName);
             }
             catch 
             { 
                 new NullReferenceException("Error"); 
             }
 
             System.Windows.Threading.DispatcherTimer dispatchertime = new System.Windows.Threading.DispatcherTimer();
             dispatchertime.Tick += new EventHandler(timer_Tick);
             dispatchertime.Interval = new TimeSpan(0, 0, 1);
             dispatchertime.Start();
         }