How do you auto format code in Visual Studio?

To format a selection: Ctrl+K, Ctrl+F

To format a document: Ctrl+K, Ctrl+D

See the pre-defined keyboard shortcuts. (These two are Edit.FormatSelection and Edit.FormatDocument.)

Note for macOS

On macOS, use the CMD ⌘ key instead of Ctrl:

• To format a selection: CMD ⌘+K, CMD ⌘+F
• To format a document: CMD ⌘+K, CMD ⌘+D

For Visual Studio 2010/2013/2015/2017/2019

• Format Document (Ctrl+K,Ctrl+D), i.e. press&hold Ctrl, press&release K then tap D as it is a sequence
• Format Selection (Ctrl+K,Ctrl+F)

Toolbar Edit -> Advanced (If you can't see Advanced, select a code file in solution explorer and try again)

Your shortcuts might display differently to mine as I am set up for C# coding but navigating via the toolbar will get you to your ones.

If it isn't working, look for errors in your code, like missing brackets which stop auto format from working