public void Update(MembershipDeal changedMembershipDeal)
        {
            var membershipDeal = context.MembershipDeals.Attach(changedMembershipDeal);

            membershipDeal.State = Microsoft.EntityFrameworkCore.EntityState.Modified;
            context.SaveChanges();
        }
        public void Delete(int id)
        {
            MembershipDeal membershipDeal = context.MembershipDeals.Find(id);

            if (membershipDeal != null)
            {
                context.MembershipDeals.Remove(membershipDeal);
                context.SaveChanges();
            }
        }
 public void Add(MembershipDeal membershipDeal)
 {
     context.MembershipDeals.Add(membershipDeal);
     context.SaveChanges();
 }