public static Classroom GetDataModel(this ClassroomBlModel blItem)
        {
            var item = new Classroom()
            {
                Id   = blItem.Id,
                Name = blItem.Name
            };

            return(item);
        }
        public static ClassroomBlModel GetBlModel(this Classroom item)
        {
            var blItem = new ClassroomBlModel()
            {
                Id   = item.Id,
                Name = item.Name
            };

            return(blItem);
        }