Could Not Load File Or Assembly "System.Net.Http, Version=4.0.0.0, Cul

Follow the following steps,

1. Update Visual Studio to the latest version (it matters)

2. Remove all binding redirects from web.config

3. Add this to the .csproj file:

   <PropertyGroup>
       <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
       <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
   </PropertyGroup>
   

4. Build the project

5. In the bin folder, there should be a (WebAppName).dll.config file

6. It should have redirects in it, copy these to the web.config

7. Remove the above snipped from the .csproj file

It should work.