.NET to .NET Standard or .NET Core

This is a simple demo showing the results of getting code from full .NET to .NET Standard.

1. The only project was FullNetLibrary, with all .cs files
2. Add a new Shared Class Library project named SharedLibrary
3. Copy all .cs files from FullNetLibrary to SharedLibrary
4. Delete all .cs files from FullNetLibrary
5. Add reference in FullNetLibrary to SharedLibrary using the Shared Projects tab in the Add Reference dialog
6. YOU ARE NOW WHERE YOU STARTED - so you can build the FullNetLibrary project and have the exact same output dll as in step 1
7. Add a new .NET Standard Class Library project named NetStandardLibrary
8. Add reference in NetStandardLibrary to SharedLibrary using the Shared Projects tab in the Add Reference dialog
9. In NetStandardLibrary add NuGet package reference to Newtonsoft.Json
10. In NetStandardLibrary add NuGet package reference to Microsoft.EntityFrameworkCore
11. Use the NETSTANDARD2_0 compiler constant to add compiler directives to the PersonFactory.cs file so it contains the original EF code for the full .NET project, and new EF Core code for the netstandard project

The result is that the FullNetLibrary still builds the exact same code in the exact same way as before we started this exercise. And we now have a NetStandardLibrary that builds most of the same code - the only differences being where we had to accomodate differences between full .NET and netstandard.