Kentico - Helpful Languages

[MoDe]

I am soon due to start using Kentico and was just wondering if anyone else had much experience with it.

My question is what languages are going to help me the most, I'm quite confident with html and css. I know the system is built on asp.net framework so would C# be beneficial?

Not sure where to start really, any help is appreciated.

 

[MoDe]

I've worked on some existing sites that are put together using .aspx and .xml files, not sure if this really counts though as most of the time they are just small amends.

Can you recommend any resources or starting points? I've got myself set up with Visual Studio which I'm guessing generates a framework for you to build upon.