Could not load file or assembly 'system.web.helpers' or one of its dependencies

Question

1.00/5 (1 vote)

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1)Exception Details:
System.IO.FileLoadException: Could not load file or assembly 'System.Web.Helpers' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)

Some times its shooting below exception:
2)Could not load file or assembly 'System.Web.WebPages.Razor,

What I have tried:

I'm using visual studio 2015 framework while in runtime.
checked with below assemblies.
<dependentAssembly>
<assemblyIdentity name="System.Web.Helpers" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="1.0.0.0" />
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
<bindingRedirect oldVersion="1.0.0.0-4.0.0.0" newVersion="4.0.0.0" />
</dependentAssembly>

I also checked several threads related to this exception however not found results. Please check below exceptions and give solutions thanks in advance.

Posted 18-Nov-16 0:50am

Meer Wajeed Ali

Updated 23-Nov-16 21:13pm

v2

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Comments

F-ES Sitecore 18-Nov-16 7:29am

You need to make sure you either have the right version of the Helpers assembly or that the bindingRedirect old and new params are right for what you have. We can't access your system, we don't know what versions of dlls you have or what versions you need.

Meer Wajeed Ali 18-Nov-16 8:09am

how do I find out what is referencing System.Web.WebPages.Razor v3.0.0.0?

In ASP.NET MVC 4, the namespace is not System.Web.WebPages.Razor, but System.Web.Razor

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appumvc · Accepted Answer · 2016-11-23T21:13:00

Solution 1

Right click and look in to the properties on the Dll available in references.

Posted 23-Nov-16 21:13pm

appumvc