/// <summary>
 /// Provides a deterministic way to create the Main property.
 /// </summary>
 public static void CreateSelector()
 {
     if (selector == null)
     {
         selector = new SelectorViewModel();
     }
 }
 /// <summary>
 /// Provides a deterministic way to delete the Main property.
 /// </summary>
 public static void ClearMain()
 {
     selector.Cleanup();
     selector = null;
 }
 /// <summary>
 /// Provides a deterministic way to delete the Main property.
 /// </summary>
 public static void ClearMain()
 {
     selector.Cleanup();
     selector = null;
 }