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C# program to get the key at the specified index of a SortedList (Example of GetKey() Method)

C# SortedList.GetByIndex() Method: Here, we are going to learn how to get the key at the specified index of a SortedList in C#.Net?
Submitted by Nidhi, on April 26, 2021

The GetKey() method of SortedList class is used to access keys from SortedList on the basis of the index, the index starts from 0 to N-1. Here, N denotes a total number of elements or keys in SortedList.

Syntax:

    object SortedList.GetKey(int index);

Parameter(s):

• index: The zero-based index of the key to get.

Return value:

It returns the key at the specified index of the SortedList.

Exception(s):

• System.ArgumentOutOfRangeException

Program:

The source code to get the key at the specified index of a SortedList is given below. The given program is compiled and executed successfully.

using System;
using System.Collections;

class SortedListEx
{
    //Entry point of Program
    static public void Main()
    {
        //Creation of SortedList object
        SortedList list = new SortedList();

        int key;

        //Add elements to SortedList 
        list.Add(1, "India");
        list.Add(5, "America");
        list.Add(2, "Austrelia");
        list.Add(3, "Africa");
        list.Add(4, "Canada");

        Console.WriteLine("keys by index:");
        for(int index=0; index<=4; index++)
        {
            key = Convert.ToInt32(list.GetKey(index));
            Console.WriteLine(key);
        }
        Console.WriteLine();

    }
}

Output:

keys by index:
1
2
3
4
5
Press any key to continue . . .

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