C# Akasztofa

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text.RegularExpressions;

namespace Oktatas
{
    // https://github.com/laszlonemeth/magyarispell/tree/master/szotar
    public class Akasztofa
    {
        static string[] dictFiles = new string[]
        {
            "resources/alap/fonev.1"
        };
        static Regex rx = new Regex(@"^(\w*)",
          RegexOptions.Compiled | RegexOptions.IgnoreCase);
        List<string> words = new List<string>();
        List<char> guesses = new List<char>();
        Random rnd = new Random();
        int round;

        public Akasztofa()
        {
            readDict();
        }


        private void readDict()
        {
            foreach (string dicFile in dictFiles)
            {
                System.IO.StreamReader file = new System.IO.StreamReader(dicFile);
                string line;
                while ((line = file.ReadLine()) != null)
                {
                    MatchCollection matches = rx.Matches(line);
                    Match match = rx.Match(line);
                    if (match.Success)
                    {
                        // System.Console.Write(line + " -> '");
                        // System.Console.WriteLine(match.Value + "'");
                        if (match.Value.Length > 0)
                        {
                            words.Add(match.Value);
                        }
                    }
                }

                file.Close();
            }
        }

        public void run()
        {
            string word = pickWord();
            round = 1;
            int errorCount = 0;
            while (true)
            {
                bool allFound = displayMaskedWord(word);
                if (allFound)
                {
                    Console.WriteLine("Done with " + errorCount + " errors.");
                    break;
                }
                char c = askForChar();
                guesses.Add(c);
                if (!word.Contains(c))
                {
                    errorCount += 1;
                }
                round += 1;
            }
        }


        private string pickWord()
        {
            int index = rnd.Next(words.Count);
            return words[index];
        }

        private bool displayMaskedWord(string word)
        {
            Console.Write("      ");
            bool allFound = true;
            for(int i=0; i<word.Length; i++)
            {
                if (guesses.Contains(word[i]))
                {
                    Console.Write(word[i]);
                }
                else
                {
                    Console.Write(".");
                    allFound = false;
                }
            }
            Console.Write("  [");
            Console.Write(String.Join(", ", guesses.ToArray()));
            Console.WriteLine("]");
            return allFound;
        }

        private char askForChar()
        {
            while (true)
            {
                Console.Write(round + ". ? ");
                string line = Console.ReadLine();

                if (line.Length > 0)
                {
                    return line[0];
                }
            }
        }
    }
}