LINQ Select from sub-list

Question

How can I make a Linq query to grab ALL Productpricediscounts from a category?

public class ProductCategory
{
    public List categoryProducts         


        

Answer 1

You need Enumerable.SelectMany

var result = categoryProducts.SelectMany(x => x.productPrices)
             .SelectMany(x => x.priceDiscounts);

Answer 2

You'll need to use SelectMany in order to access priceDiscounts:

var query = categoryProducts
            .SelectMany(x => x.productPrices)
            .SelectMany(y => y.priceDiscounts);