private void btnPlayCall_Click(object sender, EventArgs e)
 {
     if ((SelectedProduct != null) && ((SelectedProduct as CallClass).Path != ""))
     {
         CallPlayer newWin = new CallPlayer((SelectedProduct as CallClass).Path);
         newWin.ShowDialog();
     }
     else
     {
         MessageBox.Show("Media file was not found");
     }
 }