#116 – Use #region Directive to Create Code Regions

For improved readability, you can use the #region directive to create separate code regions in a C# source code file.  A code region can then be collapsed or expanded in the Visual Studio code editor.

In the example below, we surround a couple of functions with a single region called ThisAndThat.

 static void Main(string[] args)
     uint x = 0x1234;
     x &= 0x0020;

 #region ThisAndThat DoThis() and DoThat() functions that do stuff
 static void DoThis()
     counter += 12;

 static void DoThat()
     counter *= 4;

You’ll notice that in the Visual Studio editor, there is a little minus (-) sign to the left of the #region statement, indicating that this region is collapsible.

If you click on the minus (-) sign on the #region line, the entire region–both functions–collapse and you just see the name and comment associated with the region.


About Sean
Software developer in the Twin Cities area, passionate about software development and sailing.

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