networklib | multi thread network library using epollnonblocking io | TCP library

I'm using VS 2017 and I have a number of Utility class files (NetworkLib.cs, ImageLib.cs, etc) that I find myself constantly having to duplicate over and over again when creating new solutions.

Normally, I would just end up creating a dedicated separate solution, NetworkLib.csproj, compiling these into DLL files, and then adding a DLL reference whenever I need them in a new solution, but this isn't ideal for me.

I want to be able to use these in a shared library sense across multiple solution files but also when debugging if I step-into some function NetworkLib.Post() the debugger should step into the appropriate CS files. Additionally, if I make some changes to NetworkLib.cs from Solution1, all other solutions should pick it up on rebuilding.

I've given thought to creating a standalone Utility solution with a NetworkLib csproj, and then adding the project csproj as an existing project to each solution, but not sure if that's a good approach.

I also just read about the "Shared Project" but when I created it (in its own standalone solution) I can't seem to import it into other solutions. When I look in "Shared Projects" tab it just states "No Items Found".