It's not a secret that mastering your shortcut usage can significantly boost your productivity. Here I want to list the most useful of them by my opinion.

Visual Studio

Shortcut Action
ctrl+space autocomplete
ctrl+. show potential fixes
ctrl+; show solution explorer
ctrl+R, ctrl+R rename
ctrl+K, ctrl+C comment block
ctrl+K, ctrl+U uncomment block
ctrl+R, A run all unit tests

Visual Studio Code

Shortcut Action
ctrl+space autocomplete
ctrl + ` open integrated terminal
ctrl + \ split editor
ctrl + / toggle line comment
alt + Z toggle word wrap