asp.net mvc - Unit Tests - Referencing 3.0.0.0 MVC, version actually 4.0.0.0 -

i've googled, answers haven't been helpful me personally.

i testing sendemail using unit tests (nunit)

// arrange var mockdbcontext = new mock<dbcontext>(); iservice service = new service(mockdbcontext.object);  // act var result = service.sendemail(string.empty,1,1);  //assert assert.that(result, is.not.null); assert.that(result, is.instanceof<bool>()); assert.areequal(result, false);         public bool sendemail(string emailaddress, int mid, int deadline)     {         try         {             dynamic email = new email("circulationemail");             email.to = emailaddress;             email.mid = mid;             email.deadline = deadline;             email.send();              return true;         }         catch (exception ex)         {             elmah.errorsignal.fromcurrentcontext().raise(ex);             return false;         }     } 

sendemail uses postal.

i following error when run test. when debug throws error before hitting first debug point within sendemail.

system.io.fileloadexception : not load file or assembly 'system.web.mvc, version=3.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35' or 1 of dependencies. located assembly's manifest definition not match assembly reference. (exception hresult: 0x80131040) 

i added below app.config , searched through code see if ever references 3.0.0.0, doesn't.

  <runtime>     <assemblybinding xmlns="urn:schemas-microsoft-com:asm.v1">       <dependentassembly>         <assemblyidentity name="system.web.mvc" publickeytoken="31bf3856ad364e35" culture="neutral" />         <bindingredirect oldversion="0.0.0.0-4.0.0.0" newversion="4.0.0.0" />       </dependentassembly>     </assemblybinding>   </runtime> 

i wondering if maybe error message being masked (somehow) mvc wrong version one?

thanks in advance :-)

clare

a couple of options:

there few ways find out assembly loaded from. best 1 use sysinternal's processmonitor see file loading before error happens.

also try check in project if assembly reference configured "exact match".in project "references" folder select reference, go "properties" , change "specific version" false.