public static Category MakeCategory(String title, string catId, int color, bool isRoot = false)
 {
     Category cat = new Category ();
     cat.Title = title;
     cat.ID = catId;
     cat.Color = color;
     cat.IsRoot = isRoot;
     return cat;
 }
 public void AddCategory(Category cat)
 {
     _db.AddCategory (cat);
 }