Sample C# program to get all possible pairs in a list

This is a sample C# program to get possible pairs from a list of integer values. Duplicate and reverse pair values would be discarded in the program.

using System;

using System.Collections.Generic;



namespace PairFromList

{

    class Program

    {

        static void Main(string[] args)

        {

            var items = new List<int>() { 1, 2, 3, 4, 5 };

          

            for (var i = 0; i < items.Count - 1; i++)

            {

                for (var j = i + 1; j < items.Count; j++)

                {

                    Console.WriteLine(items[i] + "-" + items[j]);

                }

            }



            Console.Read();

        }

    }

}

Output :

1-2
1-3
1-4
1-5
2-3
2-4
2-5
3-4
3-5
4-5