Details of the architecture:
OS : Windows 10 64 bit
python : ver 3.5.0 (x86)
pythonnet : ver 2.4.1.0 (x86)
Visual Studio : Community ver 2019
project architecture: x86
Steps to set up the environment:
1.Install python 3.5
https://www.python.org/downloads/release/python-350/
2.Add python's folder and Lib folder in the Path environment variable
3.Install pythonnet using pip pip install pythonnet
Note: requires the wheel package.
4.Install any other python libraries that you'd be using in the winforms appln.
5.Add the path of Python.Runtime.dll to the winforms reference list:
(Project→Add preferences menu in VS)
Note: the DLL file would be located in the "...\Python 3.5\Lib\site-packages" folder.
Note: Using pythonnet from Nuget package is not recommended.
It is hard to get the python installations and the winform architectures to match.
Installing pythonnet using pip is a lot easier.