Select records that does not exist in another table in Entity Framework

Question

I have two tables - \"Customer\" table and \"Blacklist\" customer table. When I blacklist a customer, I put the customerid as a foreign key to Blacklist table.

What

Answer 1

IF in table BlackList yo have a List of Customer You can perform something like

 IEnumerable model = (from c in db.Customer
                                from b in c.BlackList.DefaultIfEmpty()
                                 where b.CusID== null
                                  select new Customer
                                   {
                                        CusId= c.OrderID
                                    }).ToList();