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Asked: 2026-06-16T00:34:44+00:00

I get the following error when I start my asp net mvc 4 application:

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I get the following error when I start my asp net mvc 4 application:

Could not load file or assembly 'DotNetOpenAuth.Core, Version=4.0.0.0, 
Culture=neutral, PublicKeyToken=2780ccd10d57b246' or one of its dependencies. 
The system cannot find the file specified

This is the error log

Assembly manager loaded from:  C:\Windows\Microsoft.NET\Framework\v4.0.30319\clr.dll
Running under executable  C:\Windows\SysWOW64\inetsrv\w3wp.exe
--- A detailed error log follows. 

=== Pre-bind state information ===
LOG: User = notebook\Guilherme
LOG: DisplayName = DotNetOpenAuth.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=2780ccd10d57b246
 (Fully-specified)
LOG: Appbase = file:///C:/Users/Guilherme/Documents/Visual Studio 2012/Projects/Gedi/Gedi/
LOG: Initial PrivatePath = C:\Users\Guilherme\Documents\Visual Studio 2012\Projects\Gedi\Gedi\bin
Calling assembly : Microsoft.Web.WebPages.OAuth, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35.
===
LOG: This bind starts in default load context.
LOG: Using application configuration file: C:\Users\Guilherme\Documents\Visual Studio 2012\Projects\Gedi\Gedi\web.config
LOG: Using host configuration file: C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet.config
LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
LOG: Post-policy reference: DotNetOpenAuth.Core, Version=4.0.0.0, Culture=neutral, PublicKeyToken=2780ccd10d57b246
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/2635bb56/154c3fbb/DotNetOpenAuth.Core.DLL.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/2635bb56/154c3fbb/DotNetOpenAuth.Core/DotNetOpenAuth.Core.DLL.
LOG: Attempting download of new URL file:///C:/Users/Guilherme/Documents/Visual Studio 2012/Projects/Gedi/Gedi/bin/DotNetOpenAuth.Core.DLL.
LOG: Attempting download of new URL file:///C:/Users/Guilherme/Documents/Visual Studio 2012/Projects/Gedi/Gedi/bin/DotNetOpenAuth.Core/DotNetOpenAuth.Core.DLL.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/2635bb56/154c3fbb/DotNetOpenAuth.Core.EXE.
LOG: Attempting download of new URL file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/Temporary ASP.NET Files/root/2635bb56/154c3fbb/DotNetOpenAuth.Core/DotNetOpenAuth.Core.EXE.
LOG: Attempting download of new URL file:///C:/Users/Guilherme/Documents/Visual Studio 2012/Projects/Gedi/Gedi/bin/DotNetOpenAuth.Core.EXE.
LOG: Attempting download of new URL file:///C:/Users/Guilherme/Documents/Visual Studio 2012/Projects/Gedi/Gedi/bin/DotNetOpenAuth.Core/DotNetOpenAuth.Core.EXE.

I have already remove all references from DotNetOpenAuth with packager manager. Also I checked by my self references for every Auth assembly I had in my project and there is none.

This is my packages.config

<packages>
  <package id="AutoMapper" version="2.2.0" targetFramework="net45" />
  <package id="EntityFramework" version="5.0.0" targetFramework="net45" />
  <package id="jQuery" version="1.7.1.1" targetFramework="net45" />
  <package id="jQuery.UI.Combined" version="1.8.20.1" targetFramework="net45" />
  <package id="jQuery.Validation" version="1.9.0.1" targetFramework="net45" />
  <package id="knockoutjs" version="2.1.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Mvc" version="4.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Razor" version="2.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.Web.Optimization" version="1.0.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi" version="4.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Client" version="4.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.Core" version="4.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="4.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebPages" version="2.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebPages.Data" version="2.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.AspNet.WebPages.WebData" version="2.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.jQuery.Unobtrusive.Ajax" version="2.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.jQuery.Unobtrusive.Validation" version="2.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.Net.Http" version="2.0.20710.0" targetFramework="net45" />
  <package id="Microsoft.Web.Infrastructure" version="1.0.0.0" targetFramework="net45" />
  <package id="Modernizr" version="2.5.3" targetFramework="net45" />
  <package id="Newtonsoft.Json" version="4.5.11" targetFramework="net45" />
  <package id="Repository" version="1.0.2.12" targetFramework="net45" />
  <package id="RestSharp" version="103.4" targetFramework="net45" />
  <package id="WebGrease" version="1.1.0" targetFramework="net45" />
</packages>

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1 Answer

  1. Editorial Team

    If you don’t want use OAuth, remove references: both the WebPages OAuth DLL (I think it’s Microsoft.Web.WebPages.OAuth.dll 1) and DotNetOpenAuth DLLs.

    1: You can find the filename in Calling assembly. So, removing all calling assembly of DotNetOpenAuth.Core should work for you. This approach should work for other unused missing references.

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