​

​

// C# program to find triplets in a given

// array whose sum is equal to given sum.

using System;

public class SumOfPairs

{

    public void pairedElements(int []arr, int sum)

    {

        int low = 0;

        int high = arr.Length - 1;

        while (low < high)

        {

            if (arr[low] + arr[high] == sum)

            {

                Console.WriteLine("The pair is : ("

                                + arr[low] + ", " + arr[high] + ")");

            }

            if (arr[low] + arr[high] > sum)

            {

                high--;

            }

            else

            {

                low++;

            }

        }

    }

    // Driver code

    public static void Main(String[] args)

    {

        int []arr = { 2, 3, 4, -2, 6, 8, 9, 11 };

        Array.Sort(arr);

        SumOfPairs sp = new SumOfPairs();

        sp.pairedElements(arr, 6);

    }

}