Getting Error as Could not load file or assembly 'Newtonsoft.Json

I installed some frameworks

Microsoft.Owin.Host.SystemWeb
Microsoft.Owin.Security.OAuth
Microsoft.Owin.Cors

After adding these, I'm getting the following error:

Could not load file or assembly 'Newtonsoft.Json, Version=10.0.0.0, 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)

Please guide me as to how I can overcome this issue.

I came a cross this issue for some years ago and the little bastard that is creating the issue is the Microsoft.Owin.Security.OAuth.

For some reason, if no newtonsoft package is installed when installing the Owin.Security.OAuth it will install it's required version but don't automatic upgrade it's reference to a newer if you install a newer newtonsoft package.

To solve it, first, uninstall the newtonsoft package

uninstall-package Newtonsoft.Json -Force

Then reinstall it

install-package Newtonsoft.Json

Then finally, update the Microsoft.Owin.Security.OAuth package

update-package Microsoft.Owin.Security.OAuth