It's also not quite as easy to declare and build an array. You can't just write

  var arr = [ 1, 2, 3];

You have to write something like

  var arr = new int[] { 1, 2, 3 };

However if you have previously declared `arr` to be of type `int[]` (or another collection type such as `List<int>`), then you can write

  arr = [ 1, 2, 3 ];

I haven't used TypeScript so don't know if it distinguishes between arrays and lists, and if so how it determines one or the other in inferred types. Would be curious to know.