Join List objects LINQ C#

 

public List getCustomerSpecials(int StoreID, int customerID)

        {

            Table<CategoryItem> specialsTable = customersTable.Context.GetTable<CategoryItem>();

            Table<CustomerCoupon> customerCouponsTable = customersTable.Context.GetTable<CustomerCoupon>();

            List<CategoryItem> specials = new List<CategoryItem>();

            List<CustomerCoupon> coupons = new List<CustomerCoupon>();

            coupons = customerCouponsTable.Where(coupon => coupon.Customer.CustomerID == customerID).ToList();

            specials = specialsTable.Where(cItem => cItem.StoreCategory.CategoryName == cItem.Item.Store.StoreCategorys[0].CategoryName && cItem.Item.Store.StoreID == StoreID).ToList();

            var query = from c in coupons

                        join s in specials on c.ItemID equals s.ItemID

                        select new { c.Item };

            return query.ToList();

        }