MVC.NET Razor views rendering differently across deployments

Question

I have a razor view in an MVC4 project that treats the same input differently in two different environments. I have a script block within an MVC section.

At my live deployment, whenever I create a less than comparison (if(a < b)), the < will be interpreted as a HTML block, and the section will render in a weird manner. Currently, I have to use Html.Raw("<"). At my development machine, I do not have this issue.

I'm sure there's a simple answer to why razor doesn't realize that the < is part of my javascript, but right now, I'm only interested in why the behavior would be different across delpoyments. I know both setups are running razor v2, since new features like conditional attributes are working in both.

What could be the cause of discrepancies such as this?

Answer 1

Check the file version of System.Web.Razor.dll in both environments and see whether it's 2.0.20715 in both places. We did release an update to Razor v2 that's included in the MVC 4 installer via Web PI, but isn't in the box in Visual Studio 2012, which might account for the difference in behavior that you're seeing.