Sort KeyValuePairs in C#

CsharpProgrammingServer Side Programming

Use the Sort method to sort the KeyValuePairs collection.

Firstly, set the collection −

var myList = new List<KeyValuePair<int, int>>();

// adding elements
myList.Add(new KeyValuePair<int, int>(1, 20));
myList.Add(new KeyValuePair<int, int>(2, 15));
myList.Add(new KeyValuePair<int, int>(3, 35));
myList.Add(new KeyValuePair<int, int>(4, 50));
myList.Add(new KeyValuePair<int, int>(5, 25));

To sort, use the Sort() method. With that, we have used the CompareTo() method to compare values −

myList.Sort((x, y) => (y.Value.CompareTo(x.Value)));

The following is the complete code −

Example

 Live Demo

using System;
using System.Collections.Generic;
class Program {
   static void Main() {
      var myList = new List<KeyValuePair<int, int>>();
      // adding elements
      myList.Add(new KeyValuePair<int, int>(1, 20));
      myList.Add(new KeyValuePair<int, int>(2, 15));
      myList.Add(new KeyValuePair<int, int>(3, 35));
      myList.Add(new KeyValuePair<int, int>(4, 50));
      myList.Add(new KeyValuePair<int, int>(5, 25));
      Console.WriteLine("Unsorted List...");
      foreach (var val in myList) {
         Console.WriteLine(val);
      }
      // Sort Value
      myList.Sort((x, y) => (y.Value.CompareTo(x.Value)));
      Console.WriteLine("Sorted List...");
      foreach (var val in myList) {
         Console.WriteLine(val);
      }
   }
}

Output

Unsorted List...
[1, 20]
[2, 15]
[3, 35]
[4, 50]
[5, 25]
Sorted List...
[4, 50]
[3, 35]
[5, 25]
[1, 20]
[2, 15]
raja
Published on 04-Sep-2018 17:41:11
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