An introductory tutorial for python, with a unique interface
The official python3 documentation. It defaults to the newest release; you can jump back to earlier versions. The Tutorial and the Library Reference are the most useful sections.
The pygame documentation
The "API" reference for the C# System object - most of the C# built-in functions live here
The C# language reference and tutorials
A directory or books on python (free and paid) for various levels and applications
(Romano and Kruger n.d.)
Romano, Fabrizio, and Heinrich Kruger. n.d. Learn Python Programming - Third Edition. Accessed January 15, 2023. https://learning.oreilly.com/library/view/learn-python-programming/9781801815093/.
(Lutz n.d.)
Lutz, Mark. n.d. Learning Python, 5th Edition. Accessed January 15, 2023. https://learning.oreilly.com/library/view/learning-python-5th/9781449355722/.
(Albahari n.d.)
Albahari, Joseph. n.d. C# 10 in a Nutshell. Accessed March 5, 2023. https://learning.oreilly.com/library/view/c-10-in/9781098121945/.
A commercial site with courses on many CS/programming topics. There are a number of free courses available, including python and C#.
Read and Write Text File in C#
Lists in C#