C# OOP Design

string strInput = Console.ReadLine().Trim(); //getAllWordsByCondictionary(strInput); //ArrayList arrWord = getAllWordsByCondictionary(strInput); //Console.WriteLine(strInput); FileStream fs; StreamReader sr; ArrayList array = new ArrayList(strInput.Length); fs = new FileStream("C:\\Temp\\input.txt", FileMode.Open); sr = new StreamReader(fs); while (false == sr.EndOfStream) { string word = sr.ReadLine().Trim(); if (word.Length <= strInput.Length && word.Length>0 ) { if(true == Include(strInput,word)) { Console.WriteLine(word); } } } Console.ReadLine(); } public static bool Include(string inputWords, string word) { char[] input = word.ToCharArray(); bool flag = true; int count = 0; for (int i = 0; flag && i < input.Length; i++) { bool fg = false; char[] words = inputWords.ToCharArray(); for (int j = 0; !fg && j < words.Length; j++) { if (input.GetValue(i).Equals(words.GetValue(j))) { fg = true; inputWords.Remove(j); } } if (fg) count++; else { flag = fg; } } return flag; }