Well, I found recent book about concurrency at last :) This time it is not free (are you surprised? I'm not) and available either as print book (search Amazon or any other your favorite book store) or official e-book (see Diesel eBook store).

Comments on it are good all over the Internet making me to be really interested about it. What's really interesting - it has been ~30 month of hard work for its author Joe Duffy to write. And he did it from inside of Microsoft: "Joe is the lead developer and architect for Parallel Extensions to .NET, tinkers with type systems, and is an author and speaker." -- personal info from Joe's blog.

Hope this book is indeed that good as everybody's screaming :)

Today I've registered on stackoverflow.com and someone got an interesting question about C#: !IsGood vs IsGood == false. I was irritated by idea to check boolean variables this way so many times

if (boolVar == false) { ... } 

But some time ago I have discovered one case where I *LIKE* to write something very simlarly looking :) Read my full answer to this question. As some kind of bonus you will find out how NOT to use operator overloading in C# ;)

I have found .NET specific book on multi-threading. Going through titles published by manning.com and apress.com didn't find anything dedicated to threading in .NET but outdated one (dealing with .NET 1.1). So will be reading this one for now: http://www.albahari.com/threading/threading.pdf

PS: didn't check it good enough for now so comments are appreciated ;) are there better ones to read? feel free to comment!

Photo got from http://www.voidspace.org.uk/ironpython/images/threads.jpg, I hope it is not prohibited to use it here