If you target your web player, no. Creating a web player is done in the sandbox and cannot load external code, therefore, with the possible exception of writing the Lua interpreter in C # (!), You are out of luck.
If you target desktop builds or mobile devices, you can enable external plugins and access them through scripts. This means that you can import Lua and tell it to run Lua script (s).
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, Pro. (iOS/Android) , Lua script, Lua.