using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        int expectedSum = 7;

        int[] values = new int[] { 3, 5, 2, -4, 8, 11 };

        List<string> resultats = new List<string>();

        for (int i = 0; i < values.Length-1; i++)

        {

            for (int j = 0; j < values.Length-1; j++)

            {

                var addition = values[i] + values[j];

                if (addition == expectedSum) {

                    resultats.Add("[" + values[i] + ", " + values[j] + "]");

                }

            }

        }

        for (int i = 0; i < resultats.Count / 2; i++)

        {

            Console.WriteLine(resultats[i]);

        }   

    }

}