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Effective C#: 50 Specific Ways to Improve Your C# ReviewFULL DISCLOSURE: I know Bill Wagner pretty well, and consider him a friend. I don't think that has colored this review, but you have a right to know. (If you doubt my objectivity, consider that I have now purchased TWO copies of this book, even though I probably could have gotten one or two for free. It's worth it!)
Back when I was a C++ programmer, there was one book everyone said I simply had to read: Effective C++ by Scott Meyers. And they were right: when I read that book, I summarized it as "Here are 50 mistakes you're making in your C++ code right now, and you don't even know it." (Note: the latest edition has been expanded to 55 mistakes.) So now that I'm a C# programmer, I eagerly looked forward to Effective C# (edited by Meyers), because I wanted that same sort of "Aha!" enlightenment.
Well, Bill Wagner failed to deliver that enlightenment. But that's a good thing, actually, and something he couldn't help. But to understand why, we have to return to Scott Meyers.
After the 50 amazingly simple improvements in Effective C++, Meyers wrote More Effective C++; and I characterized that book as, "35 really deep subjects that you have to think about and understand. Some of them will apply to your work. Some of them won't. None of them will be easy. But you really have to think about them." See, Meyers covered all the simple, universal problems in his first book, making it darned hard to make any simple, obvious C++ mistakes. That meant his second book had to cover deeper design concerns, many of which apply only in particular circumstances.
And herein lies the difference for Wagner's book. See, a generation of C++ programmers learned and internalized Meyers's lessons -- including the Microsoft team who created the C# language. When they built their C++-inspired (and Java-inspired) language, they built in a lot of the safeguards and limits that Meyers advocated as a standard practice for C++. They also built in best practices from other sources. So it's my contention that the C# equivalent to Effective C++ can't really be written. The language won't allow it.
So what Wagner has written really falls somewhere between Effective C++ and More Effective C++. There are some simple "Aha!" tips; but there are a lot more deep design concerns. That's really what the C# programmer needs, after all; and that's what Wagner delivers in a very fine fashion.
Now Wagner can explain these topics better than I can, so I'm not going to try. But I do want to comment on the items I found most useful:
5. Always provide ToString(). Your maintenance and client coders will thank you.
15. Utilize using and try/finally for Resource Cleanup. And 18. Implement the Standard Dispose Pattern. .NET pretty much solves memory leaks; but memory is only the most commonly leaked resource. And in solving memory leaks, they made it harder to manage certain other resources. In these two items, Wagner shows how to do the best job you can.
I wish I could say I was following every tip in this book; but it's hard to break bad habits. Read this book before you form bad habits yourself.
Note that the original printing of this book had a lot of typos where words rantogether. I now have a copy of the second printing, where those all seem to be fixed.
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