how can i share code in visual studio code example

Example 1: what is liveshare in vscode

Live Share is basically a addon that can be added into vs code. 
You can see what others in the session are highlighting, typing, etc.
You can even add another addon that lets you voice chat with others.

For more information click on this link:
https://code.visualstudio.com/blogs/2017/11/15/live-share

Example 2: share extensions vs code

code --list-extensions | xargs -L 1 echo code --install-extension