Visual Studio Keyboard Shortcuts

To format document in visual studio
Ctrl + K, D

To comment selected code 
Ctrl + K, C

To uncomment selected code 
Ctrl + K, U

Show intellisense
Ctrl + Space

Covert selected text to UPPERCASE
Ctrl + Shift + U

Covert selected text to LOWERCASE
Ctrl + U

Toggle Full Screen
Alt + Shift + Enter

Build Project
Shift + F6

Build Solution
Ctrl + Shift + B OR F6

Attach the debugger to a process
Ctrl + Alt + P

Expand or Collapse current element
Ctrl + M, M

Collapse all
Ctrl + M, O

Toggle all Outlining
Ctrl + M, L