Finally, I made it through chapter 11. Wow! That was quite a challenge. After going through that chapter I am not in a position to blame it on the authors that they couldn't make it an easy read. Collections, Comparisons and Conversions are advanced OOP concepts. Now, I am once again glad that I didn't give up in the middle and went through the whole chapter. But I had to use multiple references to understand the whole concept. Anyways thank you guys for creating this mind blowing reference to an already very beautiful programming language i.e, C#.