ArcMapAddinDistanceAndDirection.ViewModels.TabBaseViewModel.PromptSaveFileDialog C# (CSharp) Метод

        private string PromptSaveFileDialog()
        {
            if (sfDlg == null)
            {
                sfDlg = new SaveFileDialog();
                sfDlg.AddExtension = true;
                sfDlg.CheckPathExists = true;
                sfDlg.DefaultExt = "kmz";
                sfDlg.Filter = "KMZ File (*.kmz)|*.kmz";
                sfDlg.OverwritePrompt = true;
                sfDlg.Title = "Choose location to create KMZ file";
                
            }
            sfDlg.FileName = "";
                
            if (sfDlg.ShowDialog() == DialogResult.OK)
            {
                return sfDlg.FileName;
            }

            return null;
        }