public override void Update(Model.Mechanic item)
        {
            if (item == null) return;

            var mapped = MappingManager.Instance.Map<Model.Mechanic, Mechanic>(item);
            using (var dbContext = new CarServiceEntities())
            {
                var entry = dbContext.Entry(mapped);
                entry.State = System.Data.EntityState.Modified;

                dbContext.SaveChanges();
            }
        }
        public override void Add(Model.Mechanic item)
        {
            if (item == null) return;

            if (Guid.Equals(item.Id, Guid.Empty))
            {
                item.Id = Guid.NewGuid();
            }

            var mapped = MappingManager.Instance.Map<Model.Mechanic, Mechanic>(item);
            using (var dbContext = new CarServiceEntities())
            {
                dbContext.Mechanics.Add(mapped);

                dbContext.SaveChanges();
            }
        }