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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4.  
  5. public class Test
  6. {
  7. 	public static void Main()
  8. 	{
  9. 	    var a = new A
  10.             {
  11.                 bs = new List<B>
  12.                     {
  13.                         new B
  14.                         {
  15.                             Bs = new List<B>
  16.                                 {
  17.                                     new B
  18.                                     {
  19.                                         Cs = new List<C> {new C(), new C(), new C()}
  20.                                     }
  21.                                 },
  22.                             Cs = new List<C> {new C(), new C()}
  23.                         }
  24.                     }
  25.             };
  26.  
  27.      	Console.WriteLine(a.CountCs());
  28.  
  29.      	Console.ReadLine();
  30.  
  31. 	}
  32. }
  33.  
  34. public class A
  35. {
  36.     public List<B> bs { get; set; }
  37.  
  38.     public int CountCs()
  39.     {
  40.         return bs.Sum(b => b.TotalCs());
  41.     }
  42. }
  43.  
  44. public class B
  45. {
  46.     public List<B> Bs { get; set; }
  47.     public List<C> Cs { get; set; }
  48.  
  49.     public int TotalCs()
  50.     {
  51.         var subtotal = Bs != null ? Bs.Sum(b => b.TotalCs()) : 0;
  52.  
  53.         return subtotal + Cs.Count;
  54.     }
  55. }
  56.  
  57. public class C
  58. {
  59.  
  60. }
  61.  
Success #stdin #stdout 0.04s 24328KB
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stdin 
Standard input is empty
stdout 
5
https://ideone.com/r1gGnE
language:
C# (gmcs 5.20.1)
created:
11 years ago
visibility:
public

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