Could not load file or assembly Newtonsoft Json or one of its dependencies Manifest definition does not match the assembly reference

Question

Things I ve tried after searching    in Web Config put a binding on the old version    lt dependentAssembly gt       lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt       lt bindingRedirect oldVersion  0 0 0 0-6 0 0 0  newVersion  6 0 1 0    gt   lt  dependentAssembly gt   Edit my  csproj file to make sure there is only one Newtonsoft reference   lt Reference Include  Newtonsoft Json  Version 6 0 0 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed  processorArchitecture MSIL  gt      lt HintPath gt    packages Newtonsoft Json 6 0 1 lib net45 Newtonsoft Json dll lt  HintPath gt      lt SpecificVersion gt False lt  SpecificVersion gt      lt Private gt True lt  Private gt   lt  Reference gt   Search my computer for every Newtonsoft Json dll and delete every non 6 0 1 version and delete the contents of my temp folder Repair Reinstall the package in nuget manager console   It succeeds on building  but gets the error when going to the site   EDIT  ok  so then I tried to reinstall like every nuget package  and it seems to have added back the 4 5 version of the newtonsoft json dll  but I m getting the same error  My project s Target freamework is  NET 4 5 1 and here is the stack trace I m getting now      Server Error in     Application           Could not load file or assembly Newtonsoft Json or one of its dependencies  The located assembly s manifest definition does not match the assembly reference   Exception from HRESULT  0x80131040       Description  An unhandled exception occurred during the execution of the current web request  Please review the stack trace for more information about the error and where it originated in the code        Exception Details  System IO FileLoadException  Could not load file or assembly Newtonsoft Json or one of its dependencies  The located assembly s manifest definition does not match the assembly reference   Exception from HRESULT  0x80131040       Source Error        An unhandled exception was generated during the execution of the current web request  Information regarding the origin and location of the exception can be identified using the exception stack trace below       Assembly Load Trace  The following information can be helpful to determine why the assembly Newtonsoft Json could not be loaded        Pre-bind state information     LOG  DisplayName   Newtonsoft Json  Partial  WRN  Partial binding information was supplied for an assembly  WRN  Assembly Name  Newtonsoft Json   Domain ID  2 WRN  A partial bind occurs when only part of the assembly display name is provided  WRN  This might result in the binder loading an incorrect assembly  WRN  It is recommended to provide a fully specified textual identity for the assembly  WRN  that consists of the simple name  version  culture  and public key token  WRN  See whitepaper http   go microsoft com fwlink  LinkId 109270 for more information and common solutions to this issue  LOG  Appbase   file    c  users user documents visual studio 2013 Projects foo bar  LOG  Initial PrivatePath   c  users user documents visual studio 2013 Projects foo bar bin Calling assembly    Unknown        LOG  This bind starts in default load context  LOG  Using application configuration file  c  users user documents visual studio 2013 Projects foo bar web config LOG  Using host configuration file  C  Users user Documents IISExpress config aspnet config LOG  Using machine configuration file from C  Windows Microsoft NET Framework v4 0 30319 config machine config  LOG  Policy not being applied to reference at this time  private  custom  partial  or location-based assembly bind   LOG  Attempting download of new URL file    C  Users user AppData Local Temp 1 Temporary ASP NET Files root 48686d37 9d7a6572 Newtonsoft Json DLL  LOG  Attempting download of new URL file    C  Users user AppData Local Temp 1 Temporary ASP NET Files root 48686d37 9d7a6572 Newtonsoft Json Newtonsoft Json DLL  LOG  Attempting download of new URL file    c  users user documents visual studio 2013 Projects foo bar bin Newtonsoft Json DLL  LOG  Using application configuration file  c  users user documents visual studio 2013 Projects foo bar web config LOG  Using host configuration file  C  Users user Documents IISExpress config aspnet config LOG  Using machine configuration file from C  Windows Microsoft NET Framework v4 0 30319 config machine config  LOG  Redirect found in application configuration file  4 5 0 0 redirected to 6 0 1 0  LOG  Post-policy reference  Newtonsoft Json  Version 6 0 1 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed LOG  Attempting download of new URL file    C  Users user AppData Local Temp 1 Temporary ASP NET Files root 48686d37 9d7a6572 Newtonsoft Json DLL  LOG  Attempting download of new URL file    C  Users user AppData Local Temp 1 Temporary ASP NET Files root 48686d37 9d7a6572 Newtonsoft Json Newtonsoft Json DLL  LOG  Attempting download of new URL file    c  users user documents visual studio 2013 Projects foo bar bin Newtonsoft Json DLL  WRN  Comparing the assembly name resulted in the mismatch  Major Version ERR  Failed to complete setup of assembly  hr   0x80131040   Probing terminated    Stack Trace     FileLoadException  Could not load file or assembly  Newtonsoft Json  or one of its dependencies  The located assembly s manifest definition does not match the assembly reference   Exception from HRESULT  0x80131040     FileLoadException  Could not load file or assembly  Newtonsoft Json  Version 6 0 1 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed  or one of its dependencies  The located assembly s manifest definition does not match the assembly reference   Exception from HRESULT  0x80131040          System Reflection RuntimeAssembly  nLoad AssemblyName fileName  String codeBase  Evidence assemblySecurity  RuntimeAssembly locationHint  StackCrawlMark amp  stackMark  IntPtr pPrivHostBinder  Boolean throwOnFileNotFound  Boolean forIntrospection  Boolean suppressSecurityChecks   0        System Reflection RuntimeAssembly nLoad AssemblyName fileName  String codeBase  Evidence assemblySecurity  RuntimeAssembly locationHint  StackCrawlMark amp  stackMark  IntPtr pPrivHostBinder  Boolean throwOnFileNotFound  Boolean forIntrospection  Boolean suppressSecurityChecks   34        System Reflection RuntimeAssembly InternalLoadAssemblyName AssemblyName assemblyRef  Evidence assemblySecurity  RuntimeAssembly reqAssembly  StackCrawlMark amp  stackMark  IntPtr pPrivHostBinder  Boolean throwOnFileNotFound  Boolean forIntrospection  Boolean suppressSecurityChecks   152        System Reflection RuntimeAssembly InternalLoad String assemblyString  Evidence assemblySecurity  StackCrawlMark amp  stackMark  IntPtr pPrivHostBinder  Boolean forIntrospection   77        System Reflection RuntimeAssembly InternalLoad String assemblyString  Evidence assemblySecurity  StackCrawlMark amp  stackMark  Boolean forIntrospection   16        System Reflection Assembly Load String assemblyString   28        System Web Configuration CompilationSection LoadAssemblyHelper String assemblyName  Boolean starDirective   38   ConfigurationErrorsException  Could not load file or assembly  Newtonsoft Json  Version 6 0 1 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed  or one of its dependencies  The located assembly s manifest definition does not match the assembly reference   Exception from HRESULT  0x80131040          System Web Configuration CompilationSection LoadAssemblyHelper String assemblyName  Boolean starDirective   752        System Web Configuration CompilationSection LoadAllAssembliesFromAppDomainBinDirectory    218        System Web Configuration CompilationSection LoadAssembly AssemblyInfo ai   130         System Web Compilation BuildManager GetReferencedAssemblies CompilationSection compConfig   170        System Web Compilation BuildManager GetPreStartInitMethodsFromReferencedAssemblies    91        System Web Compilation BuildManager CallPreStartInitMethods String preStartInitListPath  Boolean amp  isRefAssemblyLoaded   285        System Web Compilation BuildManager ExecutePreAppStart    153        System Web Hosting HostingEnvironment Initialize ApplicationManager appManager  IApplicationHost appHost  IConfigMapPathFactory configMapPathFactory  HostingEnvironmentParameters hostingParameters  PolicyLevel policyLevel  Exception appDomainCreationException   516   HttpException  0x80004005   Could not load file or assembly  Newtonsoft Json  Version 6 0 1 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed  or one of its dependencies  The located assembly s manifest definition does not match the assembly reference   Exception from HRESULT  0x80131040          System Web HttpRuntime FirstRequestInit HttpContext context   9913572        System Web HttpRuntime EnsureFirstRequestInit HttpContext context   101        System Web HttpRuntime ProcessRequestNotificationPrivate IIS7WorkerRequest wr  HttpContext context   254  Version Information  Microsoft  NET Framework Version 4 0 30319  ASP NET Version 4 0 30319 18408

User · Answer

from Tools  NuGet Package Manager  Manage Package for solution update Newtonsoft Json of all solutions to latest Version

User · Answer

the solution that solved my problem for this is  goto references- right click Newtonsoft json--goto properties and check the version  this same version should be in   lt dependentAssembly gt       lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt       lt bindingRedirect oldVersion  0 0 0 0-YourDllVersion  newVersion  YourDllVersion    gt   lt  dependentAssembly gt

User · Answer

Alright so I guess the thing to do is add my answer here to this long list versus creating a duplicate question      If you are getting this in 2019  using  NET Core 3 0  Preview at this time   the solution is to ensure all projects are targeting the same  NET Core version  in my case 3 0   I think I had one project in the solution targeting 2 1 and the rest were 2 2 so I probably could have stuck with 2 2     I don t even have Newtonsoft Json installed in any of the projects  and naturally adding it to them did not fix the issue   If you have  NET Standard class libraries or w e in your solution  they don t need to be on the same version  though they should probably be the latest you can go  For example  my  NET Standard class libraries are on 2 2 as there is not a  NET Standard 3 0 yet

User · Answer

Ok  I think I got it to work now  I deleted every Newtonsoft Json dll on my machine that wasn t the latest version that I could find  made sure I had the latest version in NuGet  and build it and made sure that was the latest one in the bin folder  and I left the changes in the web config and the  csproj  Now I m on to another error  so it must be working

User · Answer

This problem was not solved for me by refreshing NuGet Packages or by performing a  Clean  on the project   It was solved by clearing out the  obj  folder manually

User · Answer

I struggled with this recently with and older project   I managed to track down the problem after checking what version of the dll that actually was in the bin folder   I had a post-build script that copied dependent assemblies from a dll library folder to the bin folder  A common setup from the days before nuget   So every time I built the post-build script replaced the correct version of Json net with the older one

User · Answer

In some cases if you delete your Bin and Obj folders will solve this problem

User · Answer

if you re working with some kind of subversion   delete the project and re-download it  it worked for me  S

User · Answer

I had exactly the same issue and Visual Studio 13 default library for me was 4 5  so I have 2 solutions one is take out the reference to this in the webconfig file  That is a last resort and it does work   The error message states there is an issue at this location  Projects foo bar bin Newtonsoft Json DLL  where the DLL is   A basic property check told me it was 4 5 0 0 or alike so I changed the webconfig to look upto 4 5 and use 4 5

User · Answer

By commenting it out this part on my web config solved my problem    lt dependentAssembly gt       lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt       lt bindingRedirect oldVersion  0 0 0 0-6 0 0 0  newVersion  6 0 0 0    gt   lt  dependentAssembly gt    But of course you need to make sure you have updated or you have the right version by doing this in your package manager console   update-package Newtonsoft Json -reinstall

User · Answer

my problem was the newVersion in this code in web config was not correct   lt dependentAssembly gt       lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt   lt bindingRedirect oldVersion  0 0 0 0-6 0 0 0  newVersion  6 0 1 0    gt      you can see the version of Newtonsoft Json package in nuget package manager and use it

User · Answer

In my case it was just a matter of   Tools - gt  NuGet Package Manager - gt  Package Manager Settings - gt  Clear Cache   The problem was caused when I remapped a TFS folder

User · Answer

I Don t know why  but in my case  even if I remove bin folder from project  when I build project it copies old version of newtonsoft json  I copied new version s dll from packages folder and It solves for now

User · Answer

I have tried the steps by Oleg  and they worked for my same situation   Steps    Run update-package Newtonsoft Json -reinstall in Package Manager  Delete your bin by enabling viewing the hidden files and deleting the bin folder  Close your Visual Studio and re-open it  Now run your project again  I believe it should be ok

User · Answer

You can solve the issue by adding below lines in web config file     lt runtime gt       lt assemblyBinding xmlns  urn schemas-microsoft-com asm v1  gt         lt dependentAssembly gt           lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral   gt           lt bindingRedirect oldVersion  0 0 0 0-8 0 0 0  newVersion  8 0 0 0   gt         lt  dependentAssembly gt       lt  assemblyBinding gt     lt  runtime gt

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Here is my solution to this problem make sure the version number in appconfig or packageconfig is same as the reference version in your references  See here

User · Answer

To solve this  I ensured all my projects used the same version by running the following command and checking the results   update-package Newtonsoft Json -reinstall   And  lastly I removed the following from my web config      lt dependentAssembly gt       lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt       lt bindingRedirect oldVersion  0 0 0 0-6 0 0 0  newVersion  6 0 0 0    gt     lt  dependentAssembly gt    If you want to ensure all your Newtonsoft Json packages are the same version  you can specify the version like so   update-package Newtonsoft Json -version 6 0 0 -reinstall

User · Answer

Easy steps   1 Run  update-package Newtonsoft Json -reinstall  in package manager    2 Delete you bin by enabling viewing the hidden files and deleting the bin folder    3 Close your visual studio and re-open it    4  Now run your project again  I believe it should be ok

User · Answer

None of these options worked for me  in the end it was   Test   Test Settings     testrunconfig  I had to add a new line   lt DeploymentItem filename  packages Newtonsoft Json 4 5 8 lib net40 Newtonsoft Json dll    gt    Make sure the path and version is correct for your setup

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What actually helped me was to turn off the Resharper build and to use the VisualStudio Re-Build option on my project

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I am using Newtonsoft Json v6 0 3  but this is what I had to do in my Web config file    lt dependentAssembly gt           lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt           lt bindingRedirect oldVersion  0 0 0 0-4 5 0 0  newVersion  6 0 0 0    gt   lt  dependentAssembly gt    Note that even though I am using 6 0 3  I had to put in newVersion  6 0 0 0   In my packages config file I have    lt package id  Newtonsoft Json  version  6 0 3  targetFramework  net45    gt

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I tried the following after having already ensured that my computer had the same version in all locations and that my projects were all pointing to the same reference path  I had also made sure that the binding of the old version was their and bound to the current version of dll that I had   I work in an environment with a strict framework and the framework team often upset the versioning with the different dll s   How I fixed this issue was to run the package manager console within visual studio  2013   From there I ran the following command   update-package Newtonsoft Json -reinstall   followed by   update-package Newtonsoft Json   This went through and updated all of my config files and relevant project files  Forcing them all to the same version of the dll  Which was initially version 4 5 before updating again to get the latest

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I had the same issue on a Test Project that had reference to an MVC 5 project  This happened after I merged with an MVC 5 project  I fixed it by installing Visual studio 2012 updates as explained here in Andre s response    In your visual studio go to   Tools  Extensions And Updates Select  Updates  in the accordion list on the left  Select  Product Updates   Update to the newest version

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After hours struggling with this    I did the following   web config   lt runtime gt      lt assemblyBinding xmlns  urn schemas-microsoft-com asm v1  gt        lt dependentAssembly gt         lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt         lt bindingRedirect oldVersion  0 0 0 0-12 0 0 0  newVersion  12 0 0 0    gt       lt  dependentAssembly gt        lt  -- other assemblies    -- gt      lt  assemblyBinding gt   lt  runtime gt    The key to enter the correct newVersion and oldVersion number is open the project s References find the package go to its properties or click alt   enter  You ll find a section Version which in my case was 12 0 0 0 while its actually 12 0 3 when exploring with Manage NuGet       So you need to pick the package s version from the reference properties  in my case 12 0 0 0    Finally  clean and rebuild the project  you might want to delete the bin and obj folders before    You might face other packages dependencies issues  i did that for all and they worked

User · Answer

I got the same problem with dotnet core and managed to fix it by clearing the NuGet cache   Open the powershell and enter the following command   dotnet nuget locals all --clear   Then I closed Visual Studio  opened it again and entered the following command into the Package Manager Console   Update-Package   NuGet should now restore all packages and popultes the nuget cache again   After that I was able to build and start my dotnet core webapi in a Linux container

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I had the same issue  I created a web api project and then upgraded it from  net 4 5 1 to  net 4 6 1  Closing the IDE  stopping IIS  and deleting contents of the C  Windows Microsoft NET Framework v4 0 30319 Temporary ASP NET Files  dir fixed the issue   HTH

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I resolved it by remove lower version of Newtonsoft json dll in bin folder and added Newtonsoft json dll V6 0 0 0 and removed the following web config elements   lt dependentAssembly gt       lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed   gt       lt bindingRedirect oldVersion  0 0 0 0-4 5 0 0  newVersion  5 0 8   gt   lt  dependentAssembly gt

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None of the answers  including the checked one did not work for me    The solution was far more simple  I first removed the references from my BUS layer  Then deleted the dll s from the project  to make sure it s gone   then reinstalled JSON NET from nuget packeges  And  the tricky part was   turning it off and on again     I just restarted visual studio  and there it worked   So  if you try everything possible and still can t solve the problem  just try turning visual studio off and on again  it might help

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If none of these works  please check this answer   https   stackoverflow com a 12011221 150370   TL DR  Remove xml namespace from configuration tag in your config file   Otherwise binding redirects will be ignored

User · Answer

I had the same error message and  like you mentioned  it was due to different versions of the Newtonsoft Json dll being referenced   Some projects in my MVC solution used the NuGet package for version 4 of that dll   I then added a NuGet package  for Salesforce in my case  that brought Newtonsoft Json version 6 with it as a dependency to one of the projects  That was what triggered the problem for me   To clean things up  I used the Updates section in the NuGet Package Manager for the solution  off Tools menu or solution right-click  to update the Json Net package throughout the solution so it was the same version for all projects   After that I just checked the App Config files to ensure any binding redirect lines were going to my chosen version as below    lt bindingRedirect oldVersion  0 0 0 0-6 0 0 0  newVersion  6 0 0 0    gt

User · Answer

I hit this problem because I had  project A  a desktop  exe  refer to project B  a portable  dll    A  amp  B had different versions of JSON Net  and so there was a loader conflict   Once I made all the versions of JSON net the same  it worked   This is in effect what some of the solutions above are doing - I m just calling out why it works

User · Answer

In my case  at the message of error was  version 6 0 0   but this version is not available to install  so i installed the  6 0 1 version  at my project and solved my problem   install-package Newtonsoft Json -Version 6 0 1 -Project MyProjectX

[json] Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies. Manifest definition does not match the assembly reference

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