Look on the nugget package manager for
"Memory.dll" it should be a package called "memory.dll" with the .dll at the end.
To get it working
Using Memory;
then initiate an object from the memory class, and just put a nameVar. and you will get the options.
To get into a games memory you need first the process id then a handle, from there on you will just read and write to memory.
If you are going to use C++ like a normal cheat creator, you will use DLLs and use pointers and you don't need any library, but whatever suites you.
IMO if you don't want to create anti cheat protection or this advance stuff, just go with C#, make a basic UI and you are done.
If you want to make a cheat for a game protected by VAC you have no way of doing that with C# without using some c++