https://weblogs.asp.net/scottgu/asp-net-mvc-3-layouts-and-sections-with-razor

MVC Section can be your friend.

/K

But that doesn't work for blocks

(Generally speaing, Blocks is a resuable component, Ideally, should not be used to render scripts)

If I am understanding it correctly, you will require to create a flag at rootlayout level to decide rather to render particular style or not rather at Block level. 

Please see http://dodavinkeln.se/post/how-to-inject-a-script-for-a-block. But instead of using .AtFooter(), use .AtHeader(). Also use RequireStyle instead of RequireScript.

@Johan Cool, I have never tried this for blocks before as I probably have missed your blog :), just wondering, If its a collection of blocks on a page? will that script be included mutiple times?

/K

You have not missed it, since you actually commented on it :)

No it will only be added once. You can also set up dependencies, so it's added before another resource and that they're added as well.

This worked perfectly, thanks Johan!