System.Net.Http.Formatting.dll causing issues with Newtonsoft.Json

Does the assemblyBinding tag have proper xmlns schema? Check if the issue you are encountering is same as Assembly binding redirect does not work

We faced same error and struggled to fix for few days. We finally we found this post on stack overflow Assembly reference cannot be resolved - dependentAssembly issue?

This made us realize to look into the version of System.Net.Http.Formatting being used and we found that our solution had been using multiple version of System.Net.Http.Formatting.dll and those each of them were referencing different version of Newtonsoft.Json.dll.

Removing references of older version of System.Net.Http.Formatting and adding references back, fixed the problem.

Hope that helps.