Is C# conventional for Game Design or Development?

Question

I'm an aspiring developer that uses GML with GameMaker: Studio but I'd like to expand my opportunities as much as possible. How or where can I start?

Answer 1

with c# you can make games in Unity, web sites in ASP.NET, and also develop all kind of apps

Answer 2

Do you think after one language, others will become easier as well? This is an aspirations goal