Could not load file or assembly Newtonsoft Json Version 9 0 0 0 Culture neutral PublicKeyToken 30ad4fe6b2a6aeed or one of its dependencies

Question

I have a WinJS project that is previously built on Windows 8 1 using VS 2013    Recently I upgraded this project to Universal Windows 10 by creating a blank Javascript Universal windows 10 project and then added all my files from old project    I have Windows Runtime Components and also Class Library for SQLite    I added Universal Windows Runtime Component and Universal Class Library and copied all my files from old project to respective places   Somehow I managed to remove all the build errors    I installed all the required SQLite-net  SQLite for Universal Windows Platform  Newtonsoft  etc   But when I run the application and call a Native method in Windows Runtime Component it gives some kind of strange errors as   An exception of type  System IO FileNotFoundException  occurred in mscorlib ni dll but was not handled in user code   Additional information  Could not load file or assembly  Newtonsoft Json  Version 9 0 0 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed  or one of its dependencies  The system cannot find the file specified     Newtonsoft version is  9 0 1  My project json file of Windows Runtime Component has following          dependencies          Microsoft NETCore UniversalWindowsPlatform    5 0 0        Newtonsoft Json    9 0 1          frameworks          uap10 0              runtimes          win10-arm            win10-arm-aot            win10-x86            win10-x86-aot            win10-x64            win10-x64-aot              My Visual Studio version is     I tried removing all the Newtonsoft json and re-installing it but no luck

User · Answer

I had a similar problem with a new ASP NET Core application a while ago  Turns out one of the referenced libraries used a version of Newtonsoft Json that was lower than 9 0 0 0  So I upgraded the version for that library and the problem was solved  Not sure if you ll be able to do the same here

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In my case it was an issue with the configuration file web config on my machine when I updated the newton version VS automatically fixed my web config file to point to the new version  When I uploaded it to production the existing web config was pointing to the old version    Once I updated the web config it started working again    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 0-11 0 0 0  newVersion  11 0 0 0    gt     lt  dependentAssembly gt

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Adding binding redirect configuration for Newtonsoft Json in your configuration file  web config  will resolve the issue    lt configuration gt       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  assemblyBinding gt       lt  runtime gt   lt  configuration gt    Since Newtonsoft Json version in your case is 9 update the version appropriatly in the configuration   If this configuration does not work make sure the namespace  xmlns  in your configuration tag is correct or remove the name space completely   Assembly binding redirect does not work

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I am using Visual Studio 2013 Update 2  In my case  I have a web project and a Web Api project and unit test project and other class libraries in a single solution   I ve spent couple of days to solve the problem  Below is the step-by-step solution that I have found    Right click on Web Api project  Select  Set as StartUp Project  Right click on Web Api project  Go to Properties   Alt   Enter    On the Application tab on left hand side menu  select Application Find Target framework  Change it to 4 5 1 and save  However  it is showing error in  Error List  window  After Rebuild  there is no error  Remove all Newtonsoft Json packs from solution by using below query from Package Manager Console   to get it View   Other Window   Package Manager Console         uninstall-package newtonsoft json -force    Reinstall Newtonsoft Json from Package Manager Console      install-package newtonsoft json    If you have latest update for Visual Studio 2013  you might not encounter with this problem  As I am using Update 2  so  while trying to install Newtonsoft Json  I have encountered with the following error       The  Newtonsoft Json 10 0 3  package requires NuGet client version    2 12  or above  but the current NuGet version i s  2 8 50313 46     To solve this problem  we need to update the Package Manager Console  Got to   Tools   Extensions and Updates      In left pane   select Updates   Visual Studio Gallery    Update the NuGet Package Manager Extension  Follow the steps that are coming afterwards  Visual Studio will take a restart after that  Execute step 6 again    After Installation packages config will be added with this below line     lt package id  Newtonsoft Json  version  10 0 3  targetFramework  net451    gt    After installation web config will be added with this below lines   lt dependentAssembly gt           lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt           lt bindingRedirect oldVersion  0 0 0 0-10 0 0 0  newVersion  10 0 0 0    gt   lt  dependentAssembly gt    It will execute successfully  if there is no other error

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I had same issue with the following version 12 0 3   Could not load file or assembly  Newtonsoft Json  Version 12 0 0 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed  or one of its dependencies  The system cannot find the file specified    This issue was only in my Test project  xUnit  and was caused by lack of newtonsoft json in this project   What is important  I was testing code from another project where library was attached and works properly

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I think AutoCAD hijacked mine  The solution which worked for me was to hijack it back  I got this from https   forums autodesk com t5 navisworks-api could-not-load-file-or-assembly-newtonsoft-json td-p 7028055 profile language en - yeah  the Internet works in mysterious ways      in your initilizer     AppDomain currentDomain   AppDomain CurrentDomain  currentDomain AssemblyResolve    new ResolveEventHandler MyResolveEventHandler           private Assembly MyResolveEventHandler object sender  ResolveEventArgs args        if  args Name Contains  Newtonsoft Json                  string assemblyFileName   Path GetDirectoryName Assembly GetExecutingAssembly   Location       Newtonsoft Json dll           return Assembly LoadFrom assemblyFileName             else         return null

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It took us a day to resolve this problem  The solution is forcing your webservice to use version 11 0 0 in your 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 0-11 0 0 0  newVersion  11 0 0 0    gt     lt  dependentAssembly gt   lt  assemblyBinding gt

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Was able to solve this problem in my asp net mvc project by updating my version of Newton Json  old Version   9 0 0 0 to  new Version 11 0 0 0   usign Package Manager

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It is possible to solve the problem by updating the  Newtonsoft  version   In Visual Studio 2015 it is possible to right click on the  Solution  and select  Manage Nuget packages for solution   search for  Newtonsoft  select a more current version and click update

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I had the same issue too  to solve this  check in References of your project if the version of Newtonsoft Json was updated  probablly don  t   then remove it and check in your either Web config or App config wheter the element dependentAssembly was updated as follows    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    After that  rebuild the project again  the dll will be replaced with the correct version

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I made a basic Demo and reproduced this problem  It seems that WinRT component failed to find the correct assembly of Newton Json  Temporarily the workaround is to manually add the Newtonsoft json dll file  You can achieve this by following steps    Right click References-  Add Reference- Browse   -  Find C  Users  nuget packages Newtonsoft Json 9 0 1 lib portable-net45 wp80 win8 wpa81 Newtonsoft json dll- Click Add button  Rebuild your Runtime Component project and run  This error should be gone

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I solved this problem by adding Newtonsoft Json to the NuGet of the startup project

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One need to update Newtonsoft Json -Version  GO to Tools    NuGet Package Manager    Package Manager Console  and Type Install-Package Newtonsoft Json -Version 12 0 2 in  Package Manager Console  Window

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I had a very similar problem   I was trying to use Newtonsoft Json dll in a  NET DLL  in the same way that I am successfully using it in  NET EXEs on my computer   I used NuGet in my Visual Studio 2017 to add Newtonsoft Json to MyDll dll   MyExecutable exe references MyDll dll   Calling a Newtonsoft Json method from code within MyDll dll raised  System IO FileLoadException  Could not load file or assembly  Newtonsoft Json  Version 12 0 0 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     I ran Microsoft s fuslogvw exe https   docs microsoft com en-us dotnet framework tools fuslogvw-exe-assembly-binding-log-viewer to check what was being loaded and found the following   LOG  Post-policy reference  Newtonsoft Json  Version 12 0 0 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed LOG  GAC Lookup was unsuccessful  LOG  Attempting download of new URL file    C  MyExecutable bin Debug Newtonsoft Json DLL  LOG  Assembly download was successful  Attempting setup of file  C  MyExecutable bin Debug Newtonsoft Json dll LOG  Entering run-from-source setup phase  LOG  Assembly Name is  Newtonsoft Json  Version 6 0 0 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed WRN  Comparing the assembly name resulted in the mismatch  Major Version ERR  The assembly reference did not match the assembly definition found  ERR  Run-from-source setup phase failed with hr   0x80131040  ERR  Failed to complete setup of assembly  hr   0x80131040   Probing terminated    MyExecutable exe had no references or calls to Newtonsoft Json  yet I found a 6 0 0 0 Newtonsoft Json dll in bin Debug directories of copies of my MyExecutable source tree from before I added any Newtonsoft Json references to any of my code   I do not know why the 6 0 0 0 Newtonsoft Json dll was there   Perhaps it was referenced by another DLL referenced by MyExecutable   I avoided the FileLoadException by using NuGet to add a reference to 12 0 0 0 Newtonsoft Json to MyExecutable   I expected that binding redirect in MyExecutable   s App config as illustrated below would be an alternative to MyExecutable   s referencing Newtonsoft Json  but it did not work

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I solved this issue by removing all the NuGet packages from solution and reinstalling them  One of the NuGet Packages was dependent upon NewtonSoft and it was not showing in references

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I was facing this issue when I added Nuget package Newtonsoft Json 12 0 0 2 into my two  netstandard library projects and it grabbed almost my full day to solve this issue  Exception -  Could not load file or assembly  Newtonsoft Json  Version 12 0 0 0  Culture neutral  PublicKeyToken 30ad4fe6b2a6aeed   The system cannot find the file specified  Solution -  I had to remove package from Nuget and went to the following location and followed the next steps - Step 1  Go to location  quot C  Users UserName  nuget packages newtonsoft json 12 0 2 lib quot  and here you will get all Nuget versions you installed previously   Step 2  Since i wanted to use it in my  netstandard 2 0 library project  so i copied  quot netstandard2 0 quot  folder from this location and paste somewhere my preferred location    where i generally keep 3rd party dlls   Step 3  Now i added DLL reference from here to my both project and this way problem solved  Thanks

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I ve experienced similar problems with my ASP NET Core projects  What happens is that the  config file in the bin debug-folder is generated with this      lt dependentAssembly gt       lt assemblyIdentity name  Newtonsoft Json  publicKeyToken  30ad4fe6b2a6aeed  culture  neutral    gt       lt bindingRedirect oldVersion  6 0 0 0  newVersion  9 0 0 0    gt       lt bindingRedirect oldVersion  10 0 0 0  newVersion  9 0 0 0    gt     lt  dependentAssembly gt    If I manually change the second bindingRedirect to this it works    lt bindingRedirect oldVersion  9 0 0 0  newVersion  10 0 0 0    gt    Not sure why this happens   I m using Visual Studio 2015 with  Net Core SDK 1 0 0-preview2-1-003177

[c#] Could not load file or assembly 'Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies

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