I just released REST API client for .NET platform which covers crucial interfaces in depth.
If anyone is interested, take a look at https://github.com/jlucansky/Camunda.Api.Client
thank you for your contribution! Would you be interested in writing a blog post for https://blog.camunda.org/ illustrating what are the use cases and may be explaining couple of example usages?
Great idea! I will try to find some time to do it.