How hard is it to create a nes emulator in c#?

Question

C++ / C#

Hello, please tell me how difficult it is to write an emulator of the old nes game console in C#? Are there special libraries for this? If so, please tell me which ones.

Answer 1

See for yourself how difficult it is for you
https://github.com/Xyene/Emulator.NES

Answer 2

It is possible to write, as there is, for example, a nintendo switch emulator on a sharp: https://ryujinx.org/
All documentation on the nes device and the rom format is in the public domain.
https://wiki.nesdev.org/w/index.php?title=Programm...
All the libraries you need are there - just google what task you need to solve in terms of emulation.
But almost everything will have to be written by yourself.