These are two simple clients for SGen, the garbage collector of the Mono project.
test-sgen.c is a minimal client program. It's not very useful but shows how to initialize SGen and allocate memory.
A more interesting case is scheme.c, which is an adapted version of an example Scheme interpreter included in Ravenbrook's MPS.
Everything needed to configure Mono, and GLib.
This requires Mono as a submodule, so first make sure it's there. Then configure Mono. It's not necessary to build it, but the config.h file needs to be there and work for your system. Then make.