Could not load file or assembly System Web Mvc

Question

My new ASP NET MVC Web Application works on my development workstation  but does not run on my web server       Server Error in     Application     Configuration Error  Description  An error occurred during the processing of a configuration file required to service this request  Please review the specific error details below and modify your configuration file appropriately      Parser Error Message  Could not load file or assembly  System Web Mvc  Version 1 0 0 0  Culture neutral  PublicKeyToken 31bf3856ad364e35  or one of its dependencies  The system cannot find the file specified     Source Error     Line 44           lt add assembly  System Web Abstractions  Version 3 5 0 0  Culture neutral  PublicKeyToken 31BF3856AD364E35   gt  Line 45           lt add assembly  System Web Routing  Version 3 5 0 0  Culture neutral  PublicKeyToken 31BF3856AD364E35   gt  Line 46           lt add assembly  System Web Mvc  Version 1 0 0 0  Culture neutral  PublicKeyToken 31BF3856AD364E35   gt  Line 47           lt add assembly  System Data DataSetExtensions  Version 3 5 0 0  Culture neutral  PublicKeyToken B77A5C561934E089   gt  Line 48           lt add assembly  System Xml Linq  Version 3 5 0 0  Culture neutral  PublicKeyToken B77A5C561934E089   gt    Source File  C  inetpub www example org web config    Line  46    Assembly Load Trace  The following information can be helpful to determine why the assembly  System Web Mvc  Version 1 0 0 0  Culture neutral  PublicKeyToken 31bf3856ad364e35  could not be loaded      WRN  Assembly binding logging is turned OFF  To enable assembly bind failure logging  set the registry value  HKLM Software Microsoft Fusion EnableLog   DWORD  to 1  Note  There is some performance penalty associated with assembly bind failure logging  To turn this feature off  remove the registry value  HKLM Software Microsoft Fusion EnableLog       Version Information  Microsoft  NET Framework Version 2 0 50727 3053  ASP NET Version 2 0 50727 3053    Do I need to install the AspNetMVCBeta-setup msi on the server   Or is there a different installer for servers

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Also check the version of the assembly in the web config inside your Views folder and make sure it matches   I sometimes forget there is a 2nd web config in that location

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In addition to the Haack post  Hanselman also has a similar post   BIN Delploying ASP NET MVC 3 with Razor to a Windows Server without MVC installed   For me  the  Copy Local   true  solution was insufficient because my Website s project references did not include all the dlls that were missing   As Scott mentions in his post  I also needed to get additional dlls from the following folder on my development box  C  Program Files  x86  Microsoft ASP NET ASP NET Web Pages v1 0 Assemblies   The error message informed me which dll was missing  System Web Infrastructure  System Web Razor  etc   I continued to add each missing dll  one by one  until it worked

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Quick  amp  Simple Solution  I faced this problem with Microsoft AspNet Mvc -Version 5 2 3 and after going through all these threads I found a simplest solution    Just follow steps    Open NuGet Package Manager in Visual studio for your project Search for Microsoft AspNet Mvc When found  change action to Uninstall and Uninstall it Once done  install it again and try it now   This will automatically fix all issues with references   See image below

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I had the same problem with a bunch of assembly files after moving the project to another solution   For me  the web config file was trying to add this assembly    lt add assembly  System Web Helpers  Version 1 0 0 0  Culture neutral  PublicKeyToken 31BF3856AD364E35   gt    Thought the reference in the project was pointing towards version 3 0 0 0  click on the reference and scroll to the bottom of the properties   Hence I just changed the reference version in the web config file    I don  t know if this was just a bug of some sort  The problem with adding all the other references was that the references appeared in the config file but it wasn t actually referenced at all in the project  inside the solution explorer  and the needed files were not copied with the rest of the project files  probably due to not being  copy local   true   Now  I wasn  t able to find these assemblies in the addable assemblies  by right clicking the reference and trying to add them from the assemblies or extensions   Instead I created a new MVC solution which added all the assemblies and references I needed  and finding them under the new projects references in the solution explorer and finding their path in the properties window for the reference   Then I just copied the libraries I needed into the other project and referenced them

User · Answer

Installing MVC directly on your web server is one option  as then the assemblies will be installed in the GAC  You can also bin deploy the assemblies  which might help keep your server clear of pre-release assemblies until a final release is available   Phil Haack posted a nice article a couple days ago about how to deploy MVC along with your app  so it s not necessary to install directly   http   www haacked com archive 2008 11 03 bin-deploy-aspnetmvc aspx

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An important consideration is the web config file  Some packages can mangle your binding redirects causing havoc  the rogue package was in house package that I did not remove the web config from the package or making sure the web config in in the package doesn t have any binding redirects  For example by removing the duplicate and incorrect node resolves this       lt runtime gt           lt assemblyBinding xmlns  urn schemas-microsoft-com asm v1  gt               lt dependentAssembly gt                   lt assemblyIdentity name  System Web WebPages  publicKeyToken  31BF3856AD364E35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 0 0  newVersion  3 0 0 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                     lt assemblyIdentity name  System Web Mvc  publicKeyToken  31bf3856ad364e35   gt                   lt bindingRedirect oldVersion  0 0 0 0-5 2 3 0  newVersion  5 2 3 0   gt                   lt assemblyIdentity name  Microsoft Owin  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt                   lt assemblyIdentity name  Microsoft Owin Security OAuth  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt assemblyIdentity name  Microsoft Owin Security  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt assemblyIdentity name  Microsoft Owin Security Cookies  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-9 0 0 0  newVersion  9 0 0 0   gt                   lt assemblyIdentity name  WebGrease  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-1 6 5135 21930  newVersion  1 6 5135 21930   gt                   lt assemblyIdentity name  Antlr3 Runtime  publicKeyToken  eb42632606e9261f  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 5 0 2  newVersion  3 5 0 2   gt                     lt assemblyIdentity name  System Web Helpers  publicKeyToken  31bf3856ad364e35   gt                   lt bindingRedirect oldVersion  1 0 0 0-3 0 0 0  newVersion  3 0 0 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  System Web Mvc  publicKeyToken  31bf3856ad364e35   gt                   lt bindingRedirect oldVersion  0 0 0 0-5 2 3 0  newVersion  5 2 3 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin Security  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-9 0 0 0  newVersion  9 0 0 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  WebGrease  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-1 6 5135 21930  newVersion  1 6 5135 21930   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin Security Cookies  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin Security OAuth  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  SimpleInjector  publicKeyToken  984cb50dea722e99  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 3 2 0  newVersion  3 3 2 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Antlr3 Runtime  publicKeyToken  eb42632606e9261f  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 5 0 2  newVersion  3 5 0 2   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  HtmlAgilityPack  publicKeyToken  bd319b19eaf3b43a  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-1 4 9 5  newVersion  1 4 9 5   gt               lt  dependentAssembly gt           lt  assemblyBinding gt       lt  runtime gt    by removing lines 8 to 24 fixes the build

User · Answer

I am using Jenkins with  net projects and had troubles with MVC 4 references   I finallys solved my issue by using a  Net reference search engine functionality based on the registry using      HKEY LOCAL MACHINE SOFTWARE Wow6432Node Microsoft NETFramework v2 0 50727 AssemblyFoldersEx   You can create subkey et set the default key to  c  myreferenceedir  for example   It saved me with MVC versions and also ASP net Web pages   Usefull to add references to the  Add Reference Dialog   http   dhakshinamoorthy wordpress com 2011 12 04 how-to-register-your-net-assembly-in-gac-and-make-it-show-in-add-reference-dialog

User · Answer

Installing MVC directly on your web server is one option  as then the assemblies will be installed in the GAC  You can also bin deploy the assemblies  which might help keep your server clear of pre-release assemblies until a final release is available   Phil Haack posted a nice article a couple days ago about how to deploy MVC along with your app  so it s not necessary to install directly   http   www haacked com archive 2008 11 03 bin-deploy-aspnetmvc aspx

User · Answer

I added  Microsoft ASP NET Razor  using Manage NuGet Packages   With Add References  for some reason  I only had System Web Helpers 1 0 0 and 2 0 0    but not 3 0 0   Another option  that worked form me was to delete the references to System Web Mvc and System Web Http    then re-add them browing to the package locations in the csproj file  you can most easily edit the project with a text editor     lt Reference Include  System Web Http  gt     lt HintPath gt    packages Microsoft AspNet WebApi Core 5 2 3 lib net45 System Web Http dll lt  HintPath gt    lt Reference Include  System Web Mvc  Version 5 2 3 0  Culture neutral  PublicKeyToken 31bf3856ad364e35  processorArchitecture MSIL  gt     lt HintPath gt    packages Microsoft AspNet Mvc 5 2 3 lib net45 System Web Mvc dll lt  HintPath gt

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Simple fix  In VS2010  right click on your MVC project  select  Add Deployable Dependencies      select the the options you want and click ok

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I just wrote a blog post addressing this  You could install ASP NET MVC on your server OR you can follow the steps here     EDIT   by jcolebrand  I went through this link  then had the same issue as Victor below  so I suggest you also add these     Microsoft Web Infrastructure   System Web Razor   System Web WebPages Deployment   System Web WebPages Razor

User · Answer

Had the same issue and added all the assembly that they said but still got the same error   turns out you need to make the  Specific Version    False

User · Answer

I ran into this same issue trying to deploy my MVC3 Razor web application on GoDaddy shared hosting   There are some additional  dlls that need to be referenced   Details here  http   paulmason biz  p 108  Basically you need to add references to the following in addition to the ones listed in  Haacked s post and set them to deploy locally as described    Microsoft Web Infrastructure System Web Razor System Web WebPages Deployment System Web WebPages Razor

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As Others have mentioned  add these refernces to visual studios with Copy Local set to true    I also had to add System Web Webpages   Microsoft Web Infrastructure System Web Razor System Web WebPages Deployment System Web WebPages Razor System Web Webpages

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In VS2010  right click the project in the Solution Explorer and select  Add Deployable Dependencies   Then check the MVC related check boxes in the following dialog   This creates a   bin deployableAssemblies  folder in the project which contains all the  dll files mentioned in other answers  I believe these get copied to the bin folder when creating a deployment package

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I ran into the same issue as sgriffinusa  In addition to the references Phil s article suggests  http   www haacked com archive 2008 11 03 bin-deploy-aspnetmvc aspx    I added these     Microsoft Web Infrastructure   System Web Razor   System Web WebPages Deployment   System Web WebPages Razor   Godaddy Deployment worked perfectly  Turn custom errors off and add references to correct the errors  That should lead you in the right direction

User · Answer

I ran into the same issue as sgriffinusa  In addition to the references Phil s article suggests  http   www haacked com archive 2008 11 03 bin-deploy-aspnetmvc aspx    I added these     Microsoft Web Infrastructure   System Web Razor   System Web WebPages Deployment   System Web WebPages Razor   Godaddy Deployment worked perfectly  Turn custom errors off and add references to correct the errors  That should lead you in the right direction

User · Answer

I added  Microsoft ASP NET Razor  using Manage NuGet Packages   With Add References  for some reason  I only had System Web Helpers 1 0 0 and 2 0 0    but not 3 0 0   Another option  that worked form me was to delete the references to System Web Mvc and System Web Http    then re-add them browing to the package locations in the csproj file  you can most easily edit the project with a text editor     lt Reference Include  System Web Http  gt     lt HintPath gt    packages Microsoft AspNet WebApi Core 5 2 3 lib net45 System Web Http dll lt  HintPath gt    lt Reference Include  System Web Mvc  Version 5 2 3 0  Culture neutral  PublicKeyToken 31bf3856ad364e35  processorArchitecture MSIL  gt     lt HintPath gt    packages Microsoft AspNet Mvc 5 2 3 lib net45 System Web Mvc dll lt  HintPath gt

User · Answer

I ve did a  Update-Package    reinstall Microsoft AspNet Mvc  to fix it in Visual Studio 2015

User · Answer

I ran into this same issue trying to deploy my MVC3 Razor web application on GoDaddy shared hosting   There are some additional  dlls that need to be referenced   Details here  http   paulmason biz  p 108  Basically you need to add references to the following in addition to the ones listed in  Haacked s post and set them to deploy locally as described    Microsoft Web Infrastructure System Web Razor System Web WebPages Deployment System Web WebPages Razor

User · Answer

I just wrote a blog post addressing this  You could install ASP NET MVC on your server OR you can follow the steps here     EDIT   by jcolebrand  I went through this link  then had the same issue as Victor below  so I suggest you also add these     Microsoft Web Infrastructure   System Web Razor   System Web WebPages Deployment   System Web WebPages Razor

User · Answer

If your NOT using a hosting provider  and you have access to the server to install     Then install the MVC 3 update tools  do that    it will save you hours of problems on a windows 2003 server   IIS6 machine      I commented on this page here   Nuget Core dll version number mismatch

User · Answer

As Others have mentioned  add these refernces to visual studios with Copy Local set to true    I also had to add System Web Webpages   Microsoft Web Infrastructure System Web Razor System Web WebPages Deployment System Web WebPages Razor System Web Webpages

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This blog post could be a duplicate of Phil s but it might help   http   www tugberkugurlu com archive deployment-of-asp-net-mvc-3-rc-2-application-on-a-shared-hosting-environment-without-begging-the-hosting-company

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This blog post could be a duplicate of Phil s but it might help   http   www tugberkugurlu com archive deployment-of-asp-net-mvc-3-rc-2-application-on-a-shared-hosting-environment-without-begging-the-hosting-company

User · Answer

I had the same problem with a bunch of assembly files after moving the project to another solution   For me  the web config file was trying to add this assembly    lt add assembly  System Web Helpers  Version 1 0 0 0  Culture neutral  PublicKeyToken 31BF3856AD364E35   gt    Thought the reference in the project was pointing towards version 3 0 0 0  click on the reference and scroll to the bottom of the properties   Hence I just changed the reference version in the web config file    I don  t know if this was just a bug of some sort  The problem with adding all the other references was that the references appeared in the config file but it wasn t actually referenced at all in the project  inside the solution explorer  and the needed files were not copied with the rest of the project files  probably due to not being  copy local   true   Now  I wasn  t able to find these assemblies in the addable assemblies  by right clicking the reference and trying to add them from the assemblies or extensions   Instead I created a new MVC solution which added all the assemblies and references I needed  and finding them under the new projects references in the solution explorer and finding their path in the properties window for the reference   Then I just copied the libraries I needed into the other project and referenced them

User · Answer

Had the same issue and added all the assembly that they said but still got the same error   turns out you need to make the  Specific Version    False

User · Answer

We want to add it because we are making a class library that uses it   For me it is here     C  Program Files  x86  Microsoft ASP NET ASP NET MVC 4 Assemblies

User · Answer

An important consideration is the web config file  Some packages can mangle your binding redirects causing havoc  the rogue package was in house package that I did not remove the web config from the package or making sure the web config in in the package doesn t have any binding redirects  For example by removing the duplicate and incorrect node resolves this       lt runtime gt           lt assemblyBinding xmlns  urn schemas-microsoft-com asm v1  gt               lt dependentAssembly gt                   lt assemblyIdentity name  System Web WebPages  publicKeyToken  31BF3856AD364E35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 0 0  newVersion  3 0 0 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                     lt assemblyIdentity name  System Web Mvc  publicKeyToken  31bf3856ad364e35   gt                   lt bindingRedirect oldVersion  0 0 0 0-5 2 3 0  newVersion  5 2 3 0   gt                   lt assemblyIdentity name  Microsoft Owin  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt                   lt assemblyIdentity name  Microsoft Owin Security OAuth  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt assemblyIdentity name  Microsoft Owin Security  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt assemblyIdentity name  Microsoft Owin Security Cookies  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-9 0 0 0  newVersion  9 0 0 0   gt                   lt assemblyIdentity name  WebGrease  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-1 6 5135 21930  newVersion  1 6 5135 21930   gt                   lt assemblyIdentity name  Antlr3 Runtime  publicKeyToken  eb42632606e9261f  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 5 0 2  newVersion  3 5 0 2   gt                     lt assemblyIdentity name  System Web Helpers  publicKeyToken  31bf3856ad364e35   gt                   lt bindingRedirect oldVersion  1 0 0 0-3 0 0 0  newVersion  3 0 0 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  System Web Mvc  publicKeyToken  31bf3856ad364e35   gt                   lt bindingRedirect oldVersion  0 0 0 0-5 2 3 0  newVersion  5 2 3 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin Security  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-9 0 0 0  newVersion  9 0 0 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  WebGrease  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-1 6 5135 21930  newVersion  1 6 5135 21930   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin Security Cookies  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Microsoft Owin Security OAuth  publicKeyToken  31bf3856ad364e35  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 0 1 0  newVersion  3 0 1 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  SimpleInjector  publicKeyToken  984cb50dea722e99  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 3 2 0  newVersion  3 3 2 0   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  Antlr3 Runtime  publicKeyToken  eb42632606e9261f  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-3 5 0 2  newVersion  3 5 0 2   gt               lt  dependentAssembly gt               lt dependentAssembly gt                   lt assemblyIdentity name  HtmlAgilityPack  publicKeyToken  bd319b19eaf3b43a  culture  neutral   gt                   lt bindingRedirect oldVersion  0 0 0 0-1 4 9 5  newVersion  1 4 9 5   gt               lt  dependentAssembly gt           lt  assemblyBinding gt       lt  runtime gt    by removing lines 8 to 24 fixes the build

User · Answer

After trying everything and still failing this was my solution  i remembered i had and error last updating the MVC version in my Visual studio so i run the project from another Visual studio  different computer  and than uploaded the dll-s and it worked  maybe it will help someone

User · Answer

Installing MVC directly on your web server is one option  as then the assemblies will be installed in the GAC  You can also bin deploy the assemblies  which might help keep your server clear of pre-release assemblies until a final release is available   Phil Haack posted a nice article a couple days ago about how to deploy MVC along with your app  so it s not necessary to install directly   http   www haacked com archive 2008 11 03 bin-deploy-aspnetmvc aspx

User · Answer

I just wrote a blog post addressing this  You could install ASP NET MVC on your server OR you can follow the steps here     EDIT   by jcolebrand  I went through this link  then had the same issue as Victor below  so I suggest you also add these     Microsoft Web Infrastructure   System Web Razor   System Web WebPages Deployment   System Web WebPages Razor

User · Answer

In VS2010  right click the project in the Solution Explorer and select  Add Deployable Dependencies   Then check the MVC related check boxes in the following dialog   This creates a   bin deployableAssemblies  folder in the project which contains all the  dll files mentioned in other answers  I believe these get copied to the bin folder when creating a deployment package

User · Answer

After trying everything and still failing this was my solution  i remembered i had and error last updating the MVC version in my Visual studio so i run the project from another Visual studio  different computer  and than uploaded the dll-s and it worked  maybe it will help someone

User · Answer

Also check the version of the assembly in the web config inside your Views folder and make sure it matches   I sometimes forget there is a 2nd web config in that location

User · Answer

I just wrote a blog post addressing this  You could install ASP NET MVC on your server OR you can follow the steps here     EDIT   by jcolebrand  I went through this link  then had the same issue as Victor below  so I suggest you also add these     Microsoft Web Infrastructure   System Web Razor   System Web WebPages Deployment   System Web WebPages Razor

User · Answer

I ve did a  Update-Package    reinstall Microsoft AspNet Mvc  to fix it in Visual Studio 2015

User · Answer

Simple fix  In VS2010  right click on your MVC project  select  Add Deployable Dependencies      select the the options you want and click ok

User · Answer

If your NOT using a hosting provider  and you have access to the server to install     Then install the MVC 3 update tools  do that    it will save you hours of problems on a windows 2003 server   IIS6 machine      I commented on this page here   Nuget Core dll version number mismatch

User · Answer

Installing MVC directly on your web server is one option  as then the assemblies will be installed in the GAC  You can also bin deploy the assemblies  which might help keep your server clear of pre-release assemblies until a final release is available   Phil Haack posted a nice article a couple days ago about how to deploy MVC along with your app  so it s not necessary to install directly   http   www haacked com archive 2008 11 03 bin-deploy-aspnetmvc aspx

User · Answer

Quick  amp  Simple Solution  I faced this problem with Microsoft AspNet Mvc -Version 5 2 3 and after going through all these threads I found a simplest solution    Just follow steps    Open NuGet Package Manager in Visual studio for your project Search for Microsoft AspNet Mvc When found  change action to Uninstall and Uninstall it Once done  install it again and try it now   This will automatically fix all issues with references   See image below

User · Answer

We want to add it because we are making a class library that uses it   For me it is here     C  Program Files  x86  Microsoft ASP NET ASP NET MVC 4 Assemblies

User · Answer

In addition to the Haack post  Hanselman also has a similar post   BIN Delploying ASP NET MVC 3 with Razor to a Windows Server without MVC installed   For me  the  Copy Local   true  solution was insufficient because my Website s project references did not include all the dlls that were missing   As Scott mentions in his post  I also needed to get additional dlls from the following folder on my development box  C  Program Files  x86  Microsoft ASP NET ASP NET Web Pages v1 0 Assemblies   The error message informed me which dll was missing  System Web Infrastructure  System Web Razor  etc   I continued to add each missing dll  one by one  until it worked

User · Answer

I am using Jenkins with  net projects and had troubles with MVC 4 references   I finallys solved my issue by using a  Net reference search engine functionality based on the registry using      HKEY LOCAL MACHINE SOFTWARE Wow6432Node Microsoft NETFramework v2 0 50727 AssemblyFoldersEx   You can create subkey et set the default key to  c  myreferenceedir  for example   It saved me with MVC versions and also ASP net Web pages   Usefull to add references to the  Add Reference Dialog   http   dhakshinamoorthy wordpress com 2011 12 04 how-to-register-your-net-assembly-in-gac-and-make-it-show-in-add-reference-dialog

[asp.net-mvc] Could not load file or assembly 'System.Web.Mvc'

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