Question

I have two classes:

public class Artikel
{
   int id{get;set;};
   string name{get;set;};
}    

public class NewArtikel
{
    int id{get;set;};
    List<Artikel> artikels{get;set;};
}

Now, I have a list of the second class

List<NewArtikel> myList = new List<NewArtikel>()

Is there are any posibility in LINQ to SQL to select all elements from myList with the needed Artikel.name

Answer 1

Yes

var allRequiredArtikels = myList.SelectMany(n => n.artikels)
    .Where(a => a.name == "requiredName");

The SelectMany flattens all Artikels from all the NewArtikel elements, then the Where filters them by name.

---

Okay so, if you want the NewArtikels that have an Artikel with the required name you could do.

var newArtikels = myList.Where(n => n.artikels
    .Any(a => a.name == "requiredName"));