.Net Framework 4.7 and different versions of components

Question

I have just installed System.Net.Http via Nuget. Package has installed System.IO (4.1.1.0). However System.IO already exists within .Net Framework 4.7 , but in version 4.0.0.0.

Why does this package is included in Framework and also exists as a separate package? .Net Framework 4.7 is young one, so why System.IO has been included if it was intended to be a separate package?

Answer 1

The System.IO package is cross-platform. When using .NET, it just redirects to the .NET assembly. When using .NET Core, it supplies a full System.IO implementation.