Install docfx based on instructions here: https://github.com/dotnet/docfx

# generate docfx documentation into ./html directory
$ docfx

After each gRPC C# release, the docs need to be regenerated and updated on the grpc.io site. The automated script will re-generate the docs (using dockerized docfx installation) and make everything ready for creating a PR to update the docs.

# 1. Run the script on Linux with docker installed
$ ./generate_reference_docs.sh

# 2. Enter the git repo with updated "gh-pages" branch
$ cd grpc-gh-pages

# 3. Review the changes and create a pull request