Does it support .net framework 4.5 and MVC4 now? or maybe in the future?

I use the page type "cshtml"

Thanks!

I had make a mistakes：

The correct approach looks like this:
UltiDev Web Server Pro config section:
Physical location --> "default document" does not need to config.

MVC4 Project structure:
/app_data
/app_start
/bin
/content
/controllers
/filters
/images
/models
/scripts
/views
views/_viewstart.cshtml
Global.asax
Web.config
packages.config

yes, .net 4.5. I created this project with "asp.net mvc4 application" template in visual studio 2012.It is a demo.

The project structure was listed before.Because app starts with "__ViewStart.cshtml",

I thought that the "default document" should be configed with value "__ViewStart.cshtml".

Actually, it did not run and throwed an error.

Finally, I found out the cause from MVC Official documentation. All files with "_" Prefix can not be explicitly call, like "__ViewStart.cshtml".