extract generic list from generic list using linq

Question

I have a generic list of type 'a' which contains a generic list of type 'b', something like this:

List<A> lA = new List<A>();
List<B> lB = new List<B>();
lb.Add(new B());
lb.Add(new B());
lb.Add(new B());
lA.Add(lB);

What I want to do is build a new list of type 'b' from lA where a property on 'b' is true.

Any help with this would be greatly appreciated,

Mark

Yury Tarabanko · Accepted Answer · 2010-07-09 10:53:00Z

2

Try this one

lA.SelectMany(a => a.PropertyOfListOfBType).Where(b => b.SomeProperty).ToList()

answered Jul 9, 2010 at 10:38

Yury Tarabanko

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1 Comment

lA.SelectMany(a => a.Where(b => b.SomeProperty)).ToList()