Visual Studio has code folding too, but code folding isn't the same as Region.

I love XCode's code folding, but sometimes it's not enough.

I've run into this several times over the past few days, the closest code-folding point sometimes hides part or all of what I need to work on.

"Region" is a line-by-line selection where the developer can choose exactly which lines need to be hidden, and it is extremely helpful