private void textBoxParsedLines_DoubleClick(object sender, EventArgs e)
        {
            int count = 0;

            if (string.IsNullOrEmpty(textBoxStringToFind.Text))
                textBoxParsedLines.Text = richTextBoxParser.Lines.Length.ToString();
            else
            {
                progressBarParser.Maximum = richTextBoxParser.Lines.Length;

               for (int i = 0;  i < richTextBoxParser.Lines.Length; i++)
                {
                    if (richTextBoxParser.Lines[i].Contains(textBoxStringToFind.Text))
                        count++;

                    progressBarParser.Value = count;
                    Application.DoEvents();
                }

                textBoxParsedLines.Text = count.ToString();

            }
        }