Visual Studio is very Rich IDE and it provides in-numerous features that makes our day to day life easy. There are some very useful hot keys and tips which can increase our productivity significantly. Earlier I used few hot keys but recently I learned few which I found awesome which drastically reduce my time while writing/debugging/reviewing the code. So learn these and make a habit of these keys and feel super charged while writing code.

1. While code review I find many time scattered and unaligned code which I hate. I use CTRL+K+D for aligning it.
2. While debugging or testing the code, commenting/commenting codes are done a lot. Use CTRL+K+C/CTRL+K+U for the same.
3. How do you up/down certain line of code. Select the code block and use ALT+up/down
4. You have a used a lot F12 to go to Definition of class. Use CTRL – to go back.
5. How do you resolve the classes by mouse click. Use CTRL+. to resolve it quickly.
6. Refactoring is very important. Use CTRL+R+M for extracting a method.
7. Find All References -> Use Shift + F12. Very helpful while debugging and fixing bugs.
8. Want to put few lines of code in try block. Try Ctrl + K + S, it provides lot more options
9. Ever tried selecting a rectangle code. Use ALT click drag.
10. Lots of code in a single file. Use  CTRL + M + O and CTRL + M + X in collapse/expand code groups like regions, methods etc.
11. Lots of code and there are no groups. Use CTRL+M+H/CTRL+M+U
12. Another super sweet. ALT+F4 to close the window.

Try using the above in your day to day coding and be more productive.

Cheers
Brij