mPrest .NET Software Developer (WPF) interview questions

First - a phone interview that went fine. Then I went to a technical interview at the company office. The interviewer was 20 min late. Didn't come ready for the interview. Didn't read my CV at all. Didn't print my test. Technical interview, from paper, not paying real attention. not seem very professional, as the face of the company. The interviewer was not interest of my answer, just some interview with prepared QA.