Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies

Question

Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies

First, It is not just duplicate. None of answers from following questions are working for me.

http://goo.gl/tS40cn
http://goo.gl/pH6v2T

I've just updated all my packages using Nuget Package Manager and I started receiving this error.

Could not load file or assembly 'Newtonsoft.Json, Version=6.0.0.0, 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)

My Package Config has:

<package id="Newtonsoft.Json" version="7.0.1" targetFramework="net45" />

Web.config includes this piece of code:

  <dependentAssembly>
    <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-4.5.0.0" newVersion="4.5.0.0" />
  </dependentAssembly>

Properties from Reference for Newtonsoft.Json

According to the answers from the similar questions, I have tried followings:

Reinstalling package using Update-Package –reinstall Newtonsoft.Json
Removing dependentAssembly config from Web.config for Newtonsoft.Json
Changing newVersion to 6.0.0.0 and 7.0.0.0 in dependentAssembly. Doing so gave birth to new error.
Also tried Get-Project -All | Add-BindingRedirect. It changes newVersion for Newtonsoft.Json to 4.5.0.0. But issue remains unresolved.

Please help me fixing this.

c#

.net

json

asp.net-mvc

json.net

asked on Stack Overflow Sep 27, 2015 by

shashwat

10 Answers

I know this is old, but I just ran into the same problem. My issue was that multiple projects in the solution used Newtonsoft.Json, but some were at different versions. I updated all of them to the most recent (9.0.1 as I type) and the problem went away.

Anyway... if anyone is still dealing with this, make sure to update the package in EVERY project in the solution.

HTH

answered on Stack Overflow Jan 31, 2017 by

Casey Crookston • edited Mar 2, 2017 by

Casey Crookston

Add Newtonsoft reference in my MVC project solves the problem for me.

answered on Stack Overflow Dec 17, 2016 by

Zafar

After trying much of the above (and some other posts), I uninstalled with the package manager all of the following from the project affected:

Microsoft.AspNet.WebApi
Microsoft.AspNet.Client
Microsoft.AspNet.Core
Microsoft.AspNet.WebHost
Newtonsoft.Json

Then reinstalled Microsoft.AspNet.WebApi, which auto installed .Client, .Core, .WebHost, .Json.

answered on Stack Overflow Feb 2, 2017 by

Kenmeister

Run Update-Package Newtonsoft.Json -Reinstall

It should remove the reference to your 4.5 version, and reinstall the newer version referenced in your package.config. It will also update the binding redirect, which should then be as follows:

<dependentAssembly>
  <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
  <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
</dependentAssembly>

Since you said in your question that you already tried this, you might want to first try removing the existing reference manually. You might also want to make sure the files aren't read-only on disk, or otherwise locked by source control.

answered on Stack Overflow Sep 28, 2015 by

Matt Johnson • edited Sep 28, 2015 by

Matt Johnson

run this command in the package manager console:

PM> Install-Package Newtonsoft.Json -Version 6.0.1

answered on Stack Overflow Sep 27, 2015 by

codeWorm

In your VS solution explorer, remove the Newtonsoft.Json reference.
Download the 6.0 binary files at Newtonsoft binary files here
Extract the files
Add the Newtonsoft library manually. From Visual Studio, right click Reference and select Add Reference
Click Browse
Navigate to the extracted files under Net45 and select Newtonsoft.Json.dll
If it does not work try using Net40 instead by going through the whole procedure again.

answered on Stack Overflow Sep 27, 2015 by

Ronald Ramos

In my case, the following code was present in my local debug version of the solution, but not in my live server version of code. Adding the code to my server Web.config file fixed the problem.

<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
  <dependentAssembly>
    <assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" />
    <bindingRedirect oldVersion="0.0.0.0-9.0.0.0" newVersion="9.0.0.0" />
  </dependentAssembly>
</assemblyBinding>

answered on Stack Overflow Oct 31, 2016 by

Colin

I had this error myself, and first used Update-Package –reinstall Newtonsoft.Json -IncludePrerelease it didn't work, then used Install-Package Newtonsoft.Json . it worked.

answered on Stack Overflow Dec 5, 2016 by

samira riazati

Change the config to as mentioned below:

answered on Stack Overflow Jan 5, 2018 by

Ash18

check the 'Newtonsoft.Json' version in the project references. Add that version in the Web config. It will work. For Example: your Webconfig look like this:

<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json"publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0"/>
</dependentAssembly>

If your version in References is '9.0.0.0' change to this:

<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json"publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="9.0.0.0"/>
</dependentAssembly>

answered on Stack Overflow Jul 13, 2018 by

SDK • edited Jul 13, 2018 by

Bhargav Rao

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