Question

How to create all combination of two letters and write them to a textfile in C#

Answer 1

using System;
using System.IO;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            letters_2();
             
        }
        private static void letters_2()
        {
            string s = "abcdefghijklmnopqrstuvwxyz", w;

            StreamWriter sw = File.CreateText(@"d:\2letters-combination.txt");

            for (int i = 0; i < s.Length; i++)
            {
                for (int j = 0; j < s.Length; j++)
                {
                    w = s[i].ToString() + s[j].ToString();
                    sw.WriteLine(w);
                }
            }
            sw.Close();
        }
    }
}

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