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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Linq;
  4. using System.Text;
  5. using System.IO;
  6.  
  7. namespace Program {
  8.     class Stahl  {
  9.         public int Laenge { get; set; }
  10.         public int Nr { get; set; }
  11.     };
  12.  
  13.     class StahlComparer : IComparer<Stahl> {
  14.  
  15.         public int Compare(Stahl x, Stahl y) {
  16.             if (x.Nr > y.Nr) return 1;
  17.             else if (x.Nr < y.Nr) return -1;
  18.             return 0;
  19.         }
  20.     };
  21.  
  22.     class Program {
  23.         static void Main(string[] args) {
  24.             var stalhs = new List<Stahl>() {
  25.                 new Stahl{ Laenge = 36, Nr = 8 },
  26.                 new Stahl{ Laenge = 36, Nr = 12 },
  27.                 new Stahl{ Laenge = 36, Nr = 14 },
  28.                 new Stahl{ Laenge = 30, Nr = 12 },
  29.                 new Stahl{ Laenge = 30, Nr = 4 },
  30.                 new Stahl{ Laenge = 36, Nr = 12 },
  31.                 new Stahl{ Laenge = 30, Nr = 12 },
  32.                 new Stahl{ Laenge = 30, Nr = 12 }
  33.             };
  34.  
  35.             stalhs.Sort(new StahlComparer());
  36.             Console.WriteLine("Sorted List: ");
  37.             foreach (var stahl in stalhs) Console.WriteLine("{0}, {1}", stahl.Laenge, stahl.Nr);
  38.  
  39.             var counts = stalhs.GroupBy(obj => new { obj.Laenge, obj.Nr }).ToDictionary(obj => obj.Key, obj => obj.Count());
  40.  
  41.             Console.WriteLine("\nOccurences: ");
  42.             foreach (var count in counts) Console.WriteLine("{0}, {1}", count.Key, count.Value);
  43.         }
  44.     }
  45. }
Success #stdin #stdout 0.06s 24280KB
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Standard input is empty
stdout
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Sorted List: 
30, 4
36, 8
30, 12
36, 12
30, 12
36, 12
30, 12
36, 14

Occurences: 
{ Laenge = 30, Nr = 4 }, 1
{ Laenge = 36, Nr = 8 }, 1
{ Laenge = 30, Nr = 12 }, 3
{ Laenge = 36, Nr = 12 }, 2
{ Laenge = 36, Nr = 14 }, 1
https://ideone.com/3gObyG
language:
C# (gmcs 5.20.1)
created:
8 years ago
visibility:
public

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