I've always wondered which built-in .Net classes are faster compared to others. There is a lot of conventional wisdom surrounding certain code classes in .Net and which ones are better to use than others. One thing that I always try and keep in mind when writing code is that different situations have different needs. As I am always keen to learn more about my trade, I decided to write some simple performance tests to see how these different classes compare against one another. Once I got into writing them, I decided to test more and more built in .net operations.