public static CarrierComment Save(CarrierComment comment)
        {
            if (comment.CommentId == 0) {
                DbContextHelper.DbContext.Add(comment);
            }

            DbContextHelper.DbContext.SaveChanges();

            return comment;
        }
        public static void Delete(int id)
        {
            // Create an entity to represent the Entity you wish to delete
            // Notice you don't need to know all the properties, in this
            // case just the ID will do.
            CarrierComment comment = new CarrierComment { CommentId = id };

            // Now attach the category stub object to the "Categories" set.
            // This puts the Entity into the context in the unchanged state,
            // This is same state it would have had if you made the query
            DbContextHelper.DbContext.AttachTo("CarrierComments", comment);

            // Do the delete the category
            DbContextHelper.DbContext.DeleteObject(comment);

            // Apply the delete to the database
            DbContextHelper.DbContext.SaveChanges();
        }