Could not load file or assembly

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error:Could not load file or assembly 'System.Web.Http.WebHost, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

My project is builded by use asp.net MVC4,EF6.0, and .net framework4.5

The guy set up the server said that he already had .net framework4.5 there, but in the application pool I only could see 4.0 and when I put the published website project over there,show error about.

Doesn't anyone know what happen? how to solve it??????????

Posted 25-Nov-14 16:47pm

SandyZhang2014

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Jineesh TR 25-Nov-14 23:35pm

This may be the file or assembly is not there in you references..

George Jonsson 26-Nov-14 0:25am

Well, check if the server has .Net 4.5 installed.

3 solutions

Solution 2

Please check your web.config for the version of file. Other workaround is to set reference dll property local copy as true.

Posted 26-Nov-14 17:30pm

Amlendu

Solution 1

Hi Jineesh,

Yes, It indeed missing file, I don't know why I published it put in IIS server won't work, but I put the developing version(it means that didn't publish it.)over there it work.

Posted 26-Nov-14 14:29pm

SandyZhang2014

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Akhil Mittal · Accepted Answer · 2014-11-26T18:39:00

Solution 3

Just register your IIS with .Net 4.5 using regiis command and you'll get to see the .net 4.5 app pool too. Assign that to your application and test.

Posted 26-Nov-14 18:39pm

Akhil Mittal