PatternsGen

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;

namespace VariableLengthPatternGen
{
    class Program
    {
        /// <summary>
        /// Main method, reads in from file list of numbers and breaks them up
        /// into sets so number 5555 would generate 5, 55, 555, 5555
        /// Then sends them to CreatePatterns to create the patterns
        /// </summary>
        /// <param name="args"></param>

        private static void Main(string[] args)
        {
            //Reads in file and creates a list
            var file = File.ReadAllLines("test.txt");
            var phoneNum = file.ToList();

            //get the length taht the final expression needs to be
            var size = phoneNum[0].Length;
            var levelAll = new List<string>();

            foreach (var k in phoneNum) // brakes up each number passed through and adds it to the proper list
            {
                var charArr = k.ToCharArray();
                var x = "";
                foreach (var t in charArr)
                {
                    x += new string(new[] { t });

                    levelAll.Add(x);
                }
            }

            levelAll = PatterenGen.PatternList(levelAll, size);
            levelAll.Sort();
            PrintList(levelAll);
            Console.ReadKey();
        }

        /// <summary>
        /// Pritns out the final patterns.
        /// </summary>
        /// <param name="plist"> is the final list being printed out to the console</param>
        public static void PrintList(List<string> plist)
        {
            foreach (var expression in plist)
            {
                Console.WriteLine(expression); //prints out list
            }
        }
    }
}

    }