I am aware of the other question on this topic. Unfortunately, that question did not solve the problem.
My problem is outlined almost to the letter in this question. I am running the gmail-api in c# and the authenticator is complaining that it cannot find the System.Net.Http.Primitives file. I have followed all the steps of the answer--both steps 1 and 2.
Yet, the code still isn't finding the .Primitives version 4.2.29 (the current version of the primitives file). Is there another step to making sure the code can find the primitives file? I have updated all of the nuget packages in the solution to the latest versions. The primitives file is both present in the project and has been redirected to in the App.config file.