// DELETE
 public void Deletea_Supplier(int id)
 {
     using (ShopDBEntities db = new ShopDBEntities())
     {
         a_Supplier a_Supplier = db.a_Supplier.Find(id);
         db.a_Supplier.Remove(a_Supplier);
         db.SaveChanges();
     }
 }
        // SELECT * FROM a_Supplier WHERE Id = Id
        public a_SupplierViewModel Geta_SupplierById(int id)
        {
            using (ShopDBEntities db = new ShopDBEntities())
            {
                a_Supplier a_Supplier = db.a_Supplier.Find(id);

                a_SupplierViewModel Model = new a_SupplierViewModel();
                Model.ID   = a_Supplier.ID;
                Model.Code = a_Supplier.Code;
                Model.Name = a_Supplier.Name;
                Model.City = a_Supplier.City;

                return(Model);
            }
        }