This [stackoverflow question](https://stackoverflow.com/questions/31336767/how-to-integrate-lua-with-net). This points us to [moonsharp](https://www.moonsharp.org/) which is a Lua interpreter for [.NET](/aw/lang/cs/DotNet), [Mono](/aw/lang/cs/MonoProject) and Unity. This in turn points to [this github](https://github.com/moonsharp-devs) though it appears development has stalled. It claims to be 99% compatible with Lua 5.2.

Alternatively (same stackoverflow question), there is [NLua](http://nlua.org/) and [its github](https://github.com/NLua/NLua).