public static void initLeters()
        {
            List <string> lines = MyTextReader.read(MyTextReader.LETTERS);

            letters = new List <char>();
            foreach (string line in lines)
            {
                letters.Add(line[0]);
            }
        }
        private void loadTextForTextBox()
        {
            try
            {
                StringBuilder SB    = new StringBuilder();
                List <string> lines = MyTextReader.read(MyTextReader.TUTORIAL_PROGRAM_FILE);
                foreach (string line in lines)
                {
                    SB.Append(line + "\n\r");
                }

                tutorialTextBox.Text = SB.ToString();
            }
            catch (NullReferenceException)
            {
                MessageBox.Show("Отсутствует файл со справкой");
            }
        }