The type or namespace 'Mvc' does not exist in the namespace 'System.Web'

Question

I recently installed VS.NET 2012 and moved my ASP.NET MVC 4 project over. However, on building the solution I get hundreds of errors with :

The type or namespace 'Mvc' does not exist in the namespace 'System.Web' (are you missing an assembly reference)

AFAIK ASP.NET MVC 4 is built into VS 2012 and there is nothing that needs to be installed. Any ideas how to get rid of these errors and build the application?

Gabe · Accepted Answer · 2012-09-07 14:03:20Z

3

You need to include the reference to the assembly System.Web.Mvc in you project.

answered Sep 7, 2012 at 14:03

Gabe

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5 Comments

dotNetNewbie Over a year ago

duh... the references were broken. Thanks :)

Dan Esparza Over a year ago

For future solution seekers, this may be in the 'Extensions' section of 'Assemblies' in the Reference Manager dialog of Visual Studio now...

serge Over a year ago

didn't help, the error is stil there (the build succeeds, but the error aprears in one of the open views...)

rsenna Over a year ago

In my case, I did move the whole MVC project to another folder, but I forget to fix the <hintPath> references on the .csproj file.

Dan Csharpster Over a year ago

yeah, the hintpath can be crucial for this.

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