Added C# to bindings page
As a C library, bindings can be made to call H3 functions from different programming languages. This page lists different bindings currently available. Contributions to this list are welcome, please feel free to open a [pull request](https://github.com/uber/h3/tree/master/docs/community/bindings.md).
+## C#
+
+- [entrepreneur-interet-general/h3.standard](https://github.com/entrepreneur-interet-general/H3.Standard)
+
## Erlang
- [helium/erlang-h3](https://github.com/helium/erlang-h3)
