I Want to Covert the String Variable Contain "09222023" to this Format 22.09.2023

Hi,

it’s double quote matter of Windows project. Can you try to use (copy and paste) the following expression?

DateTime.ParseExact(strString,"MMddyyyy",System.Globalization.CultureInfo.InvariantCulture).ToString("dd.MM.yyyy")

FYI

Regards,