This is the official Sharp7 repository starting with release 1.1.1.
Previous releases are available in the SourceForge repository.
The official site is still here.
Sharp7 is a single-file library, because it is aimed at industrial programmers, that is, those who need to equip their programs with S7 communication.
I have seen many revisions in pure Microsoft style: one file for each constant, this is not the goal of Sharp7.
Copy Sharp7.cs into your project folder, add Sharp7 in your project tree, write:
using Sharp7;
and you are ready to communicate with Siemens PLCs, without any more hallucinations.