private void CheckIntWrite()
 {
     using (var db = new AppDb())
     {
         var itm = new TableIntType
         {
             IntField = 31416147
         };
         db.TableIntType.Add(itm);
         db.SaveChanges();
     }
 }
        private void CheckIntReadWrite()
        {
            using (var db = new AppDb())
            {
                var itm = new TableIntType
                {
                    IntField = 31416147
                };
                db.TableIntType.Add(itm);
                db.SaveChanges();

                var uid = db.TableIntType.OrderByDescending(x => x.Id).FirstOrDefault();
                Assert.Equal(uid.IntField, 31416147);
            }
        }