Question

I have 3 classes with the following properties:

OfferList class:

Guid Id
IEnumerable<Offer> Offers

Offer class:

Guid Id
Product Product

Product class:

Guid Id

An OfferList contains multiple Offers and an Offer has exact 1 Product.

How can I get an IEnumerable containing all Products of an OfferList?

OfferList offerList = this.GetOfferList(id);
IEnumerable<Product> products = offerList.Offers.SelectMany?

Answer 1

You simply need to project:

IEnumerable<Product> products = offerList.Offers.Select(o => o.Product);