Microsoft Software Engineer interview questions

There was a phone interview followed by a full day technical and later management meeting. The phone interview was just a quick chat about my previous experience. The day long interview was with two software developers. They had a list of technical questions. Silly stuff really, difference between a struct and a class. Some object orientated questions. MSSQL database design schemas and the like. The two guys were pleasant. The managerial interview went well up to the point where he asked why I had listed Linux on my CV when I was applying to Microsoft. He seemed to be implying that I was a radically anti-Microsoft. It was unpleasant.