internal static void SaveFile()
{
var excelPackage = DataToExcel.CopyDBtoExcel();
SaveFileDialog saveFileDialog = new();
saveFileDialog.Filter = "xlsx files (*.xlsx)|*.xlsx|xls files (*.xls)|*.xls";
saveFileDialog.FilterIndex = 1;
if (saveFileDialog.ShowDialog() == true)
{
FileInfo fi = new FileInfo(saveFileDialog.FileName);
excelPackage.SaveAs(fi);
}
}