LINQ Concat child lists in a list
c#, linq
Solution
var allObjectB = myList.SelectMany(x=>x.Children).ToList();
Problem
In my code I have a List of ObjectA each of which has a list of ObjectB. I would like to get one list of all the ObjectBs in my list of ObjectAs. If I have this objects: ``` public class ObjectA { public string Name {get; set;} public List<ObjectB> Children {get; set;} } public class ObjectB { public string ChildName {get; set;} } ``` And this code: ``` void Main() { var myList = new List<ObjectA>{ new ObjectA{ Name = "ItemA 1", Children = new List<ObjectB>{ new ObjectB{ChildName = "ItemB 1"}, new ObjectB{ChildName = "ItemB 2"} } }, new ObjectA{ Name = "ItemA 2", Children = new List<ObjectB>{ new ObjectB{ChildName = "ItemB 3"}, new ObjectB{ChildName = "ItemB 4"} } } }; // What code would I put here to concat all the ObjectBs? } ``` I want to get a `List<ObjectB>` with 4 `ObjectB` items: ItemB 1 ItemB 2 ItemB 3 ItemB 4