sample .NET 8 console app using NuGet pythonnet package and Python XmlSchema library for XSD 1.1 validation

You need to make sure you have Python 3 (e.g. Python 3.12) installed and set the path to the relevant dll as an environment variable e.g. in my sample setup the environment variable PYTHONNET_PYDLL points to the local C:\Users\marti\AppData\Local\Programs\Python\Python312\python312.dll installation dll.

Furthermore, in the local Python installation install the XmlSchema library with e.g. python -m pip install xmlschema.