VS 2015 IntelliSense: Assembly Not Referenced Error -

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i switched vs 2015. have older mvc 5 app runs against 4.52. in vs 2013 it's fine.

in vs 2015 i'm getting red squigglies under @html.textboxfor() error indicating:

the type 'expression<>' defined in assembly not referenced. must add reference assembly 'system.core, version=4.0.0.0, culture=neutral, publickeytoken=b77a5c561934e089'.

the project builds , runs fine -- concerned intellisense error never happened in vs 2013. okay, try add reference system.core recommended in error above , error:

a reference 'system.core' not added. component automatically referenced build system.

again, fine in vs 2013.

i had same issue, in mean time i've found answer:

i had add following references web.config (add inside opening system.web tag):

<compilation debug="true" targetframework="4.5">     <assemblies>                 <add assembly="system.core, version=4.0.0.0, culture=neutral, publickeytoken=b77a5c561934e089"/>                 <add assembly="system.data, version=4.0.0.0, culture=neutral, publickeytoken=b77a5c561934e089"/>                 <add assembly="microsoft.csharp, version=4.0.0.0, culture=neutral, publickeytoken=b03f5f7f11d50a3a"/>                 <add assembly="system.runtime, version=4.0.0.0, culture=neutral, publickeytoken=b03f5f7f11d50a3a" />                    <add assembly="system.web.abstractions, version=4.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35" />                 <add assembly="system.web.helpers, version=3.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35" />                 <add assembly="system.web.routing, version=4.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35" />                 <add assembly="system.web.webpages, version=3.0.0.0, culture=neutral, publickeytoken=31bf3856ad364e35" />                 <add assembly="system.web.mvc, version=5.2.3.0, culture=neutral, publickeytoken=31bf3856ad364e35" />             </assemblies>         </compilation>

i changed target framework 4.5.1 4.5.

p.s close , reopen visual studio after changing it.


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