I am doing work for somebody who would like their JavaScript library organized into categories: CRUD functions, Form functions, etc. They really like the utility of regions in C
a Lot of people have already answered on how to get this in Visual studio I will however suggest a different approach. Since #region is a tag limited to visual studio, it will mostly not be detected by other editors.
But in most other editors, they do however recognize "if" and "while" conditions. You can use if (1) and While(1) to create blocks of collapsible code that can be folded.
for eg
// This is a comment for the code block below
if(1){
....
...
}
you will get a -/+ sign next to this code block in many others editors (Unless you are using basic notepad)