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C# program to check whether a SortedList object contains a specific key (Example of ContainsKey() Method)

C# SortedList.ContainsKey() Method: Here, we are going to learn how to check whether a SortedList object contains a specific key in C#.Net?
Submitted by Nidhi, on April 27, 2021

The ContainsKey() method of SortedList class is used to check whether a SortedList object contains a specific key.

Syntax:

    bool SortedList.ContainsKey(object key);

Parameter(s):

• key: The key to locate in the SortedList object.

Return value:

It returns a boolean value, if the key is found within SortedList then it returns true, otherwise it returns false.

Program:

The source code to check whether a SortedList object contains a specific key 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();

        bool ret = false;

        //Add elements to SortedList 
        list.Add(101, "India    ");
        list.Add(105, "America  ");
        list.Add(102, "Australia");
        list.Add(103, "Africa   ");
        list.Add(104, "Canada   ");

        ret = list.ContainsKey(102);
        if (ret == true)
            Console.WriteLine("102 is contained in list");
        else
            Console.WriteLine("102 is not contained in list");

        ret = list.ContainsKey(108);
        if (ret == true)
            Console.WriteLine("108 is contained in list");
        else
            Console.WriteLine("108 is not contained in list");
    }
}

Output:

102 is contained in list
108 is not contained in list
Press any key to continue . . .

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