public override void execute()
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog()
            {
                Filter = "Lilypond|*.ly|PDF|*.pdf"
            };

            if (saveFileDialog.ShowDialog() == true)
            {
                string extension = System.IO.Path.GetExtension(saveFileDialog.FileName);
                if (extension.EndsWith(".ly"))
                {
                    SaveToLilypondCommand saveToLilypondCommand = new SaveToLilypondCommand(_lilypondEditor, saveFileDialog.FileName);
                    saveToLilypondCommand.execute();
                }
                else if (extension.EndsWith(".pdf"))
                {
                    SaveToPDFCommand saveToLilypondCommand = new SaveToPDFCommand(_lilypondEditor, saveFileDialog.FileName);
                    saveToLilypondCommand.execute();
                }
                else
                {
                    MessageBox.Show($"Extension {extension} is not supported.");
                }
            }
        }
        public override void execute()
        {
            if (_fileName == "")
            {
                SaveFileDialog saveFileDialog = new SaveFileDialog()
                {
                    Filter = "PDF|*.pdf"
                };
                if (saveFileDialog.ShowDialog() == true)
                {
                    _fileName = saveFileDialog.FileName;
                }
                else
                {
                    return;
                }
            }

            string withoutExtension = Path.GetFileNameWithoutExtension(_fileName);
            string tmpFileName      = $"{_fileName}-tmp.ly";

            SaveToLilypondCommand saveToLilypond = new SaveToLilypondCommand(_lilypondEditor, tmpFileName);

            saveToLilypond.execute();

            string lilypondLocation = @"C:\Program Files (x86)\LilyPond\usr\bin\lilypond.exe";
            string sourceFolder     = Path.GetDirectoryName(tmpFileName);
            string sourceFileName   = Path.GetFileNameWithoutExtension(tmpFileName);
            string targetFolder     = Path.GetDirectoryName(_fileName);
            string targetFileName   = Path.GetFileNameWithoutExtension(_fileName);

            var process = new Process
            {
                StartInfo =
                {
                    WorkingDirectory = sourceFolder,
                    WindowStyle      = ProcessWindowStyle.Hidden,
                    Arguments        = String.Format("--pdf \"{0}\\{1}.ly\"", sourceFolder, sourceFileName),
                    FileName         = lilypondLocation
                }
            };

            process.Start();
            while (!process.HasExited)
            { /* Wait for exit */
            }


            try
            {
                if (sourceFolder != targetFolder || sourceFileName != targetFileName)
                {
                    File.Move(sourceFolder + "\\" + sourceFileName + ".pdf", targetFolder + "\\" + targetFileName + ".pdf");
                    File.Delete(tmpFileName);
                }

                MessageBox.Show("Successful saved to PDF");
            }
            catch
            {
                MessageBox.Show("Could not convert to PDF");
            }

            _fileName = string.Empty;
        }