/// <summary>
 /// Provides a deterministic way to create the Main property.
 /// </summary>
 public static void ClockAdd()
 {
     if (_clockAddViewModel == null)
     {
         _clockAddViewModel = new ClockAddViewModel(); 
     }
 }
 /// <summary>
 /// Provides a deterministic way to delete the Main property.
 /// </summary>
 public static void ClearClockAdd() 
 {
     _clockAddViewModel.Cleanup();
     _clockAddViewModel = null;
 }