Recently I joined a Silverlight technology group. the creator of this group is also the creator of the yinguang Chinese website. there are many experts discussing issues and many resources for download. most of the content is in English. After trying to read it, I feel that the technology itself is very profound. I am reading the original English version... it is more profound. the progress is too slow. so when my mind was still in the turmoil of the English world, I was attracted by the title of Objective C. the reason is: I have seen this book on many websites. and is also being studied recentlyProgramScalability and efficiency. so I took a look. indeed, some gains have been made. although. net3.5 some methods are no longer needed. but I feel that many companies are. the framework of net2.0. there will be a lot of help. understand. net CLR mechanism has no disadvantages.