private static void Save(IDocument spreadsheetDocument) { SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.DefaultFileName = "DataGrid"; saveFileDialog.DefaultExt = ".ods"; if (saveFileDialog.ShowDialog() == true) { using (Stream stream = saveFileDialog.OpenFile()) { using (InMemoryPackageWriter inMemoryPackageWriter = new InMemoryPackageWriter(stream)) { OpenDocumentTextExporter openDocumentTextExporter = new OpenDocumentTextExporter(inMemoryPackageWriter); spreadsheetDocument.Save(saveFileDialog.SafeFileName, openDocumentTextExporter); } } } }