Attempt by security transparent method WebMatrix WebData PreApplicationStartCode Start

Question

Update  same for mvc 4 to mvc 5   I started a new mvc 4 project and migrated an mvc 3 project in it  controllers models scripts etc   While everything compiles now i get the following error      Attempt by security transparent method  WebMatrix WebData PreApplicationStartCode Start    to access security critical method  System Web WebPages Razor WebPageRazorHost AddGlobalImport System String   failed    I can t find anything on the web with this error  The error hits before getting into the application start   I tried reinstalling all assemblies with nuget  putting a  clean  web config to no avail   Anyone had this problem before

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Reinstalling Microsoft AspNet WebHelpers works for me  Update-Package    reinstall Microsoft AspNet WebHelpers

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I tried all of the above solutions and it still wouldn t work  until I found that the web config compilation element was referencing version 2 0 0 0 of WebMatrix Data and WebMatrix WebData  Changing the version of those entries in the web config to 3 0 0 0 helped me

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Just one more suggestion    This was caused for me by some old dll s from an MVC 3 project after upgrading to MVC 5 in the site bin folder on the deployment server  Even though these dll s were no longer used by the code base they appeared to be causing the problem  Cleaned it all out and re-deployed and it was fine

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I installed webapi with it via the helppages nuget package  That package replaced most of the asp net mvc 4 binaries with beta versions which didn t work well together with the rest of the project  Fix was to restore the original mvc 4 dll s and all was good

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I had the same problem  I had to update MVC Future  Microsoft AspNet Mvc Futures   Install-Package Microsoft AspNet Mvc Futures

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You may also get       Could not load file or assembly  WebMatrix Data  Version 3 0 0 0    Culture neutral  PublicKeyToken 31bf3856ad364e35  or one of its   dependencies  The located assembly s manifest definition does not   match the assembly reference   Exception from HRESULT  0x80131040    This has moved to this package   Install-Package Microsoft AspNet WebPages Data   You should probably do a clean build before attempting any of the answers to this question and after updating packages

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For me this error was because I did NOT have Microsoft AspNet WebHelpers installed after updating from MVC 4 to MVC 5   It was fixed by installing the NuGet package  Install-Package -Id  Microsoft AspNet WebHelpers

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I have removed it from my references Then run this in Package Manager Console  Install-Package WebMatrix Data   Finally add WebMatrix WebData assembly to references and rebuild project It works for me I hope it solves your problem too

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Deleting all files from bin and then rebuilding the solution worked for me

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Here is how I fixed this issue   Open the nuget package manager console and install the below nuget packages   Install-Package WebMatrix Data Install-Package Microsoft AspNet WebHelpers Update-Package   Clean the solution  rebuild and my asp net web app starts working

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For anyone landing here who is trying to upgrade from MVC 4 to MVC5  I was able to resolve this issue by following the instructions at http   www asp net mvc tutorials mvc-5 how-to-upgrade-an-aspnet-mvc-4-and-web-api-project-to-aspnet-mvc-5-and-web-api-2    I also had to install the  Microsoft AspNet WebApi WebHost  package from nuget  But that s it    Oh  and I had to create this appSetting   lt add key  owin AutomaticAppStartup  value  false    gt

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I ve been struggling with a similar issue when upgrading mvc 4 to mvc 5      Attempt by security transparent method  System Web WebPages Administration SiteAdmin RegisterAdminModule    to access security critical method  System Web WebPages ApplicationPart  ctor System Reflection Assembly  System String   failed     The delete extra files check box in the publish dialog solved it for me

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If you are getting the error      Attempt by security transparent method    WebMatrix WebData PreApplicationStartCode Start      to access security critical method    System Web WebPages Razor WebPageRazorHost AddGlobalImport System String     failed     In order to fix this install this package using NuGet package manager   Install-Package Microsoft AspNet WebHelpers   After that   probably you will get another error      Cannot load WebMatrix Data version 3 0 0 0 assembly   to fix this install this package using NuGet package manager   Install-Package Microsoft AspNet WebPages Data

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For me this errors resolved by adding   lt system web gt    lt trust level  Full  gt    lt  system web gt    in web config

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For me this error was caused by DotNetOpenAuth not being compatible with MVC5 after upgrading from MVC4 to MVC5  Uninstalling Microsoft Web WebPages OAuth fixed the problem

[asp.net-mvc] Attempt by security transparent method 'WebMatrix.WebData.PreApplicationStartCode.Start()'

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