With WPF, Microsoft started from scratch and built a UI framework that is more logical, powerful, and integrated than previous frameworks. But it's different from previous frameworks, and you need to understand its structure and paradigms to use it effectively.
One of the reasons WPF has a reputation of having a steep and extensive learning curve is that we, as programmers, think that all UI frameworks are pretty much the same, just with different API classes, methods, and parameters. In the case of WPF, however, this definitely is not case. The result is that when programmers just jump from another framework to WPF without learning the basics, they're frustrated that everything seems so different.
The purpose of this book is to teach ...