Visual Studio Live Share (VS Live Share or VSLS) is a development project tool to allow team collaborative editing of source code within Microsoft Visual Studio or Visual Studio Code.  VSLS is currently in preview or pre-release mode as a Visual Studio Marketplace extension and may become a paid product in the future.

More information can be found here:

• VS Live Share – Documentation
• VS Live Share – Frequently Asked Questions
• Visual Studio Live Share Audio
• Using VS Live Share with Visual Studio
• Using VS Live Share with Visual Studio Code
• VS Live Share – Language and platform support
• Troubleshooting Visual Studio Live Share
• VS Live Share at GitHub.com