visual studio 2010 - asp.net MVC 3 solution doesnt work after opening in VS 12 -

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i created asp.net mvc 3 application using visual studio 2010. working fine. uploaded hosting has asp.net mvc 3 installed , worked. opened mvc 3 solution in visual studio 2012. @ time, did gradation. created 

151marketing.v11.suo upgradelog.html upgradelog.xml  , folder named _upgradereport_files , backup folder.

when publish on live server, errors of framework. see backup folder wel guess created before conversion vs 12. should use or there other way change current version of code work on hosting because after opened in vs 12, made several changes well.

please suggest

probably mvc3 project got updated mvc4.

replace project type guid old mvc3 ones (in .csproj file):

<projecttypeguids>{e53f8fea-eae0-44a6-8774-ffd645390401};{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</projecttypeguids>

if that's case, careful used referenced libraries (version).

if use mvc4, should localcopy assemblies /bin directory. also, might have switched 4.5 framework. might want take down 4.0. mvc4 works fine framework 4.0 way.

if doesn't work, you'll better create new mvc3 project, , copy cshtml , controllers on (not web.config) old project.

if have administrative rights, can install asp.net mvc4 update visual studio 2010. if don't want localcopy mvc4 assemblies, might want install mvc4 runtime on server.


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