public Apple GetDefaultApple(FruitDescription desc)
 {
     return(new Apple()
     {
         Description = desc
     });
 }
 public IEnumerable <FruitDescription> AllDescriptions()
 {
     foreach (FruitSize size in Enum.GetValues(typeof(FruitSize)))
     {
         foreach (FruitColor color in Enum.GetValues(typeof(FruitColor)))
         {
             FruitDescription desc = new FruitDescription(size, color);
             yield return(desc);
         }
     }
 }