A good lecture for beginners to start with WPF... (WPF feels more complicated than Windows Forms, so it's hard to get started... but it gives you confidence that you've done something.) Each lecture is about 5 to 10 minutes long, and it's a type that only teaches the essentials without unnecessary content. In fact, there's no explanation in the lecture... but when I followed the code, I understood why it was written that way. (Is the type where the code explains the program?) However, I think it would have been better if it had included the part about using MVVM in the part about using MariaDB. Additionally, if it had included the part about MariaDB + WCF data binding, it might have been a more practical lecture.. (Or even Firebase...)