Shortcut key to expand the selected collapsed block/region in Visual Studio C#

Question

It is very frustrating to hold mouse just when my cursor is on the correct location but I can't expand the block.

I use Ctrl+M , Ctrl+O to collapse to definition. But not able to expand one of the block after that. I have to hold the mouse and click on the plus sign.

Thanks in advance.

Answer 1

Here Ctrl+M, Ctrl+M toggles expansion.