If you are interested in Data Structure and Algorithm but only available in C#, then my advise is DON’T TAKE THIS BOOK. First, you would waste your time trying to debug the codes in this book, which have many, many mistakes. Second, only some of the topics are written carefully. The rest of them, the author only presents to you the very basic of the concepts, one or two sentences about a long code. You will have to interpret the code yourself and study again with other sources if you want a clear understanding of these topics.