MabiPacker.Dialogs.OutputDir C# (CSharp) Method

        public string OutputDir(string OutputDir = "")
        {
            string caption = Properties.Resources.ChooseUnpackDir;
            if (isVista)
            {
                CommonOpenFileDialog dOutputDir = new CommonOpenFileDialog();
                dOutputDir.IsFolderPicker = true;
                dOutputDir.Title = caption;
                dOutputDir.Multiselect = false;
                if (dOutputDir.ShowDialog() == CommonFileDialogResult.Ok)
                {
                    OutputDir = dOutputDir.FileName;
                }
            }
            else
            {
                OpenFileDialog dOutputDir = new OpenFileDialog();
                dOutputDir.InitialDirectory = OutputDir;
            }
            return OutputDir;
        }

        private void tbUnpack_Click(object sender, EventArgs e)
        {
            string outputDir = d.OutputDir();

            if (outputDir != "")
            {
                d.Unpack(this.PackFile, outputDir);
            }
            return;
        }