Why is my Visual Studio monocolour?

So i’m just a begginer with Unity (and VS) and I don’t know why my VS 2015 doesn’t show different colours instead of a single colour for all the code, which make it really hard for me to understand what is going on in my scripts.

In case you don’t know what i’m talking about:
In everyone else’s scripts //comentaries are green (for example), however all my syntax is in the same colour. Do you know how to change this?

(Sorry for the bad explanation btw)

Try this within Visual Studio:
Tools → General → Color Theme, Change this to something and apply it.

You can also import settings from the internet:
https://studiostyl.es/

Also check the extension type of the file you’re editing.