asp.net mvc - MVC 3.0 Missing Compiler Required Error -


i have mvc 3.0 .net 4.0 razor application periodically giving me runtime error:

cs0656: missing compiler required member 'microsoft.csharp.runtimebinder.binder.invokemember'

i can temporarily fix error deleting dlls bin directory -microsoft.scripting.core.dll -microsoft.scripting.extensionattribute.dll

these re-added when re-compile , @ random intervals error. these scripting dlls seem exist because reference facebook dll , project references .net 3.5 project. should these dlls exist in bin directory of 4.0 project @ all?

by way, i've not upgraded project previous version of .net , i'm not using mono other people have reported.

im thinking of starting blank new project , copying stuff it, still have issue if need re-add same references. else have better idea?

thanks!

this due using older version of facebook.dll in case maybe if receive error when referencing facebook.


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