Just because a language is "better" doesn't always correlate with its popularity. I do agree that C# is better (at least when I used it a few years ago), but I

Just because a language is "better" doesn't always correlate with its popularity. I do agree that C# is better (at least when I used it a few years ago), but I'm asking more about what platform/ecosystem changes occurred to increase its popularity...windows phone coming out or something? EDIT: Ok, people have answered with Mono and Unity...thanks!