Package DotNetLightning.ClnRpc contains a utility to work with c-lightning
under DotNetLightning.ClnRpc namespace.
The most important type is ClnClient which you can use it for calling its Json RPC in a typesafe way.
See the example for how to use it.
c-lightning has a feature called plugin. See the c-lightning document to know what is the plugin (and how it works in general).
DotNetLightning.ClnRpc.Plugin namespace contains a utility for building your own plugin.
The most important type is PluginServerBase.
By overriding this type, you can easily create your own plugin.
Please read the API reference for how to use the type.
see its API reference and an example C# project for how to use.