Adding a reference to PropertyChanged.Fody

PropertyChanged.Fody and its dependencies are installed using NuGet. So let's install the NuGet package as follows:

1. In the News project, install the PropertyChanged.Fody NuGet package.
2. Accept any license dialog boxes.

This will install the relevant NuGet packages. If you are using Visual Studio for Mac, you also need to create a FodyWeaver file. It's nothing complex, just a simple Extensible Markup Language (XML) file that describes which weavers you have installed. The next section explains how to add this file to the project if it's missing.