Can you ever truly separate markup and content? What if you want emphasize a word in your content? You would need some sort of syntax to highlight the word. What if your content required a table, that it only made sense when contained in columns and rows? This exists for CMS applications as well. The theory is that you only store "content" in the database, and "style" in the presentation. For basic content that works, but falls apart with real world usage.

You should copyright the term "Hot Swappable Software" to describe your goal. If we can figure out how to hot swap a hard drive running a mission critical server, we should be able to do the same with software. My guess is that this would need to be an OS feature because you have would have to swap while it is in RAM. Although you could use the application pool concept that IIS uses, and have the next version ready to load and set the application pool to recycle after X number of minutes.

Just occurred to me that Billy and I made the same mistake the for statement should be: for (int i = 1; i <= 100; i++) we were missing the 100th display.

Or a method in a C# Console App: private static void FizzBuzzTest() { for (int i = 1; i < 100; i++) { if ((i % 3 == 0) && (i % 5 == 0)) Console.WriteLine("FizzBuzz"); else if (i % 3 == 0) Console.WriteLine("Fizz"); else if (i % 5 == 0) Console.WriteLine("Buzz"); else Console.WriteLine(i.ToString()); } } I went with 4 conditions instead of 3 for easier for debugging.