c# - Periodically seeing the ASP.NET error CS0656: Missing compiler required member -

c# - Periodically seeing the ASP.NET error CS0656: Missing compiler required member -

i'm seeing next error crop (seemingly @ random) on web application. running windows server 2008r2, iis 7.5, mvc3, .net 4.5.

it's same error every time: cs0656: missing compiler required fellow member 'microsoft.csharp.runtimebinder.binder.binaryoperation'

when error occurs, can take restart of application pool, re-install of our application itself, prepare it.

the error occurs on brand-new vm images (no previous installation of our software), machines have had our software installed on it. error can occur upon first run of application, or when application has sat long plenty iis application pool recycle worker process (so seems).

this becoming hard deal with, i've done ton of research on error, , tried multiple solutions, no luck. also, random frequency @ error occurs has made hard troubleshoot. insight issue, or ideas on possible solutions, appreciated. i'm willing seek @ point.

this looks familiar. if recall corectly had delete bin directory , rebuild because older versions of dlls floating around , class introduced in .net 4.0

after research, site seems agree: http://our.umbraco.org/forum/using/ui-questions/20474-missing-compiler-required-member-microsoftcsharpruntimebinderbinderinvokemember

c# asp.net-mvc iis-7.5