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  1. using System;
  2. using System.Linq;
  3. using System.Collections;
  4. using System.Collections.Generic;
  5.  
  6. public class Test
  7. {
  8. 	public static void Main()
  9. 	{
  10. 		var myList = 
  11.         	new List<ObjectA>{
  12.             	new ObjectA{
  13.                 	Name = "ItemA 1", 
  14.                 	Children = new List<ObjectB>{
  15.                         	new ObjectB{ChildName = "ItemB 1"},
  16. 	                        new ObjectB{ChildName = "ItemB 2"}
  17.                     	}
  18.             	},
  19.             	new ObjectA{
  20.                 	Name = "ItemA 2", 
  21.                 	Children = new List<ObjectB>{
  22.                         	new ObjectB{ChildName = "ItemB 3"},
  23. 	                        new ObjectB{ChildName = "ItemB 4"}
  24.                     	}
  25. 	            }
  26.         	};
  27.     	// What code would I put here to concat all the ObjectBs?
  28.     	var allObjB = new List<ObjectB>();
  29.     	myList.ForEach(x => allObjB.AddRange(x.Children));
  30.     	allObjB.ForEach(x => Console.WriteLine(x.ChildName));
  31. 	}
  32. }
  33. public class ObjectA
  34. {
  35.     public string Name {get; set;}
  36.     public List<ObjectB> Children {get; set;}
  37. }
  38.  
  39. public class ObjectB
  40. {
  41.     public string ChildName {get; set;}
  42. }
Success #stdin #stdout 0.01s 29672KB
comments (?)
stdin
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Standard input is empty
stdout
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ItemB 1
ItemB 2
ItemB 3
ItemB 4
https://ideone.com/piypJq
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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