• MSSQL Extension Version: 1.1.0
• VSCode Version: 1.14.1
• OS Version: Windows 7 Enterprise SP1

Steps to Reproduce:

1. In Visual Studio Code, type CTRL + , to open the settings.json file
2. On the right pane within the curly braces on a new line (e.g., the user settings), type //This is a test
3. Type CTRL + S to save the settings.json file
4. Follow the steps "Connect to SQL Server" as described in tutorial to create a new valid connection
5. In Visual Studio Code, type CTRL + , to open the settings.json file
6. Observe that the comment line has been removed