What exactly does / do in web.config in MVC 5?

Question

I am about to migrate a bunch of projects from .NET 4.0 + MVC 3 to .NET 4.5.2 + MVC5.

To make this easier, I\'ve created a new blank MVC project to compare DLL refer

Answer 1

These settings are used for dynamic compilation. They can be safely removed from the web.config if you do pre-compilation and only put the compiled assemblies on the webserver.

See also The impact of multiple compiler definitions in system.codedom in web.config