Enable MVC Add View to Orchard Project

1. Select the Porject you want to enable mvc
2. Right Click and Select Unload Project
3. Right Click Unloaded Project file and click Edit Project File
4. Search for  ProjectTypeGuids and add following guid to enable mvc projects
 {E53F8FEA-EAE0-44A6-8774-FFD645390401};


{E53F8FEA-EAE0-44A6-8774-FFD645390401};{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}

http://ericphan.net/blog/2011/1/22/tip-enable-mvc-3-add-view-to-orchard-code-generated-module-p.html