As part of the effort to revitalize OpenTK, we’ve managed to set up a modern, clean and simpler website, which you’re hopefully reading this on.
From time to time in the coming months we’ll be writing a few tutorials here and there for using OpenTK. For now, though, we’d suggest This set of tutorials for learning Modern OpenGL. The examples and code given should be trivially translatable from C/C++. If you need a hand, you can always ask on Gitter.
Our next steps from here are to simplify the build process and project structure.