SampSharp.OpenMp.Core is the core library for writing open.mp gamemodes in C# using SampSharp. It provides the foundational infrastructure for hosting a .NET gamemode within an open.mp server, including the startup and interop layer for communicating with the open.mp component.
SampSharp is a toolkit that allows you to write gamemodes in C# for open.mp servers using the .NET runtime. SampSharp's aim is to provide all features of object-oriented programming and modern .NET development.
For general documentation and guides, see https://sampsharp.net.