Could not load file or assembly 'Newtonsoft.Json' Version=11.0.0.0

Question

I have read a lot of the responses to previous versions of this issue but none seem to work.

Every time I open my script component in Visual Studio 2015 (v14.0.25431.01 update 3) it tells me I am missing a reference to Newtonsoft.Json. So I go into NuGet Package manager and it asks me to Restore which I do and says it completes successfully.

I then save and try and run my SSIS package and get the following error.

Could not load file or assembly 'Newtonsoft.Json, Version=11.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependancies. The system cannot find the file specified.

my packages.config file looks like this.

    <?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="Newtonsoft.Json" version="11.0.1" targetFramework="net45" />
</packages>

and my app.config file looks like this.

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
      <assemblyIdentity name="Newtonsoft.Json"
                publicKeyToken="30AD4FE6B2A6AEED" culture="neutral"/>
      <bindingRedirect oldVersion="0.0.0.0-11.0.0.0" newVersion="11.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

I can navigate to the folder that it is looking for and see the .dll file

C:\Users\lp1.db\AppData\Local\Temp\Vsta\SSIS_SC130\VstaGbmf__V5kCUWonnRT2qrG_g\packages\Newtonsoft.Json.11.0.1\lib\net45\Newtonsoft.Json.dll

Has anyone else had this continual issue with it losing the ability to find the file despite being set.

Answer 1

Remove all the references to Newtonsoft.Json in all your projects.

Go to Nuget Package Manager (right click on solution), download Newtonsoft.Json latest version and select all the projects to use it, and reinstall it.

Make sure the packages.config have the latest version:

<packages>
  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net461" />
</packages>

Rebuild solution.