Could not load file or assembly System.Net.Http version 4.1.1.0

Go to the app.config and remove all the lines there that reference System.Net.Http.

I got the issue, and realized that it was because I had two different references. one reference was from my project library, and the second one was a dependency of a .Net Standard library, and therefore a Nuget package. The steps to solve were the following:

• Remove the reference to System.Net.Http (project => add reference => remove the reference).
• Keep the System.Net and System.Net.Http Nuget packages
• Run Update-Package –reinstall System.Net.Http to bring back the reference.

Now it works again. :)

Fixed it by updating System.Net.Http to 4.3.1