UndoSelectedFile() 개인적인 메소드

private UndoSelectedFile ( ) : System.Threading.Tasks.Task
리턴 System.Threading.Tasks.Task
 private async void OnUndoCommand(object sender, EventArgs e)
 {
     try
     {
         await sccService.UndoSelectedFile();
     }
     catch (Exception)
     {
     }
 }
 private void OnUndoCommand(object sender, EventArgs e)
 {
     sccService.UndoSelectedFile();
 }