Question

Linq to Objects – Where search within a list

    internal class ProdQtyByWarehouse     {         public int id { get; set; }         public List<ProdWarehouseQty> ProdWarehouseQtys { get; set; }     }      internal class ProdWarehouseQty     {         public int id { get; set; }         public string PName { get; set; }     }      protected void Page_Load(object sender, EventArgs e)     {         var list1 = new List<ProdWarehouseQty>                         {                             new ProdWarehouseQty                                 {                                     id = 3,                                     PName = 'list1PN1'                                 },                             new ProdWarehouseQty                                 {                                     id = 4,                                     PName = 'list1PN2'                                 }                          };         var list2 = new List<ProdWarehouseQty>                         {                             new ProdWarehouseQty                                 {                                     id = 5,                                     PName = 'list2PN1'                                 },                             new ProdWarehouseQty                                 {                                     id = 6,                                     PName = 'list2PN2'                                 }                          };         var prodQtyByWarehouses = new List<ProdQtyByWarehouse>                                       {                                           new ProdQtyByWarehouse {id = 1, ProdWarehouseQtys = list1},                                           new ProdQtyByWarehouse {id = 1, ProdWarehouseQtys = list2}                                        };         List<int> integers = new List<int>{2,3,4,6};          List<ProdQtyByWarehouse> list =             (from c in prodQtyByWarehouses              where c.ProdWarehouseQtys.Contains(new ProdWarehouseQty {id = 3})              select c).ToList(); // no object is returned     } 

How can i achieve:

List<ProdQtyByWarehouse> list =             (from c in prodQtyByWarehouses              where c.ProdWarehouseQtys.Contains(new ProdWarehouseQty {id in integers})              select c).ToList(); 

Answer 1

List<ProdQtyByWarehouse> list =     (         from c in prodQtyByWarehouses         where c.ProdWarehouseQtys.Exists(x => integers.Contains(x.id))         select c     ).ToList();