We published a new github repo showing how to deploy two Windows container services in a single application communicating with each other, the frontend written in C# and the backend written in nodejs. This sample is interesting since it has one application project that deploys the services as guest executables and another application project that then deploys the same services that have been built as container images. That way you get to see that Service Fabric treats these services equally, the difference being whether you want the faster deployment and startup times of using processes (guest execs) or the ability to have a container image (portable format, however longer deployment and startup times). The choice is yours.
The URL for the repo is https://github.com/Azure-Samples/service-fabric-dotnet-containers