App Model Recommendations
The C# Player’s Guide focuses on C# programming, rather than the various app models that you can use to build different types of applications. A solid understanding of C# is extremely important to even begin working in any of those app models, and each could be its own book (or several).
So here are my recommendations for your next steps into an app model.
There are a lot of technologies wrapped up in the bundle of technologies known as ASP.NET. The best starting point that I’m personally familiar with is Microsoft’s official documentation.
There are several flavors of desktop development that you can use with C#.
For Windows Forms, I recommend Microsoft’s documentation.
I’m not personally very familiar with Universal Windows Platform (UWP), but the little I do know, I learned through Microsoft’s documentation.
Mobile App Development
Xamarin Forms is the primary C# mobile app development tool, and Microsoft’s documentation is the best source for learning that I’m aware of.
There are a lot of ways to make games in C#.
Unity evokes strong feelings in people–some love it and some hate it. But it is so popular that it cannot be ignored. I have not gone through any Unity books or other online material in depth, but often find myself digging through Unity’s tutorials and manual for various reasons. They’re a good starting point.
If MonoGame is more your style (you have more control, but also have more to build yourself) then I might suggest my own MonoGame tutorials.
Got a Suggestion?
If you are aware of a resource for learning one of these app models that you think would be worth adding, let me know and I’ll add them in.