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  1. using System;
  2. using System.Globalization;
  3. using System.Linq;
  4. using System.Collections;
  5. using System.Collections.Generic;
  6.  
  7. public class Test
  8. {
  9. 		class grpitem
  10. 	    {
  11. 	        public int groupCode;
  12. 	        public string item;
  13. 	    }
  14.  
  15.         static List<grpitem> list = new List<grpitem>()
  16.         {
  17.              new grpitem() {groupCode=3, item="b"},
  18.              new grpitem() {groupCode=1, item="b"},
  19.              new grpitem() {groupCode=3, item="c"},
  20.              new grpitem() {groupCode=2, item="b"},
  21.              new grpitem() {groupCode=2, item="a"},
  22.              new grpitem() {groupCode=2, item="c"},
  23.              new grpitem() {groupCode=1, item="a"},
  24.              new grpitem() {groupCode=3, item="a"},
  25.              new grpitem() {groupCode=3, item="d"}
  26.         };
  27.         public static void Main()
  28.         {
  29.             IEnumerable<grpitem> ordered = list.OrderBy(grp => grp.groupCode).GroupBy(grp => grp.groupCode)
  30.                 .SelectMany(g => g.OrderBy(grp => grp.item));
  31.  
  32. 	        foreach(grpitem g in ordered)
  33. 	            Console.WriteLine("groupCode:{0} item:{1}",g.groupCode,g.item);
  34.  
  35. }
  36. }
  37.  
Success #stdin #stdout 0.05s 28476KB
comments (?)
stdin
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Standard input is empty
stdout
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groupCode:1 item:a
groupCode:1 item:b
groupCode:2 item:a
groupCode:2 item:b
groupCode:2 item:c
groupCode:3 item:a
groupCode:3 item:b
groupCode:3 item:c
groupCode:3 item:d
https://ideone.com/Ayk8H5
language:
C# (gmcs 5.20.1)
created:
9 days ago
visibility:
public

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