I have some 5+ years' background in C++/Unix development. I have been trying my hand at C#/.Net/WPF based software development for some time now. I am at a stage where I can write functioning applications fluently, but am not sure how to take my skills to the next level.
So, my question(s) to you all, especially to those who are experienced in C#/.Net/WPF:
What are the component skills and knowledge that an expert developer on this platform should have?
What technology-specific books would you expect a would-be expert to have read?
What other deliberate steps can I take to become really good at application development using C#/.Net/WPF?
Many thanks in advance! I would be especially grateful for comprehensive answers - I'm pretty sure many other developers have similar questions.