When I'm writing code I don't get the code options or the variables, I only get general things and for me the autocomplete is very helpful. Does anyone know how to activate it?
You could check if you have intellisense enabled for C#.
Herramientas--> Opciones--> Editor de Texto--> C#--> Intellisense.
Review the options in that section. If that doesn't work out, maybe reinstalling or repairing Visual Studio can fix it.
All the best