C Sharp SortedList

C# SortedList<TKey, TValue>

The SortedList<TKey, TValue> class is used to store the values in ascending order based on the key as an array of key/value pairs. Found in the System.Collections.Generic namespace, the C# SortedList<TKey, TValue> class contains unique keys only, thus the stored elements can be easily searched or removed using the key. The SortedList<TKey, TValue> class is similar to the SortedDictionary<TKey, TValue> class in C#. Difference between the C# SortedList<TKey, TValue> and the C# SortedDictionary<TKey, TValue> class: Though the use and behavior of the SortedList<TKey, TValue> class and the SortedDictionary<TKey, TValue> class are almost similar, but they yet hold some differences. The major differences between these two classes are listed below:

SortedList<TKey, TValue> class SortedDictionary<TKey, TValue> class
Uses less memory. Uses more memory.
Recommended to use for storing and retrieving the key/value pairs. Less recommended.
Slower insertion and removal for unsorted data. Faster insertion and removal for unsorted data.


using System;  
using System.Collections.Generic;  
public class Example  
    public static void Main(string[] args)  
        SortedList<string, string> countries = new SortedList<string, string>();  
        foreach (KeyValuePair<string, string> i in countries)  
            Console.WriteLine(i.Key+" "+ i.Value);  



In the above example, we are using the generic SortedList<TKey, TValue> class. The Add() method is used to store the elements and the for-each loop is used to iterate the elements. To get the key and value, we are using the KeyValuePair class. All the elements are stored in the SortedList<TKey, TValue> class in the ascending order based on the key, irrespective of the fact that the elements are added in ascending order or not.


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