Can't write the file '/etc/apt/sources.list'

[ZhouJiatai]

• VSCode Version: 1.47.3
• Local OS Version: 19041.388
• Remote OS Version: 4.4.0-19041-Microsoft
• Remote Extension/Connection Type: WSL

Steps to Reproduce:

1.Open WSL (Ubuntu 20.04 LTS), enter "code" plus enter.
2.Open the file (etc/apt/sources.list), edit this file and save it.
3.Then program said,

未能保存“sources.list”: 无法写入文件"vscode-remote://wsl+ubuntu/etc/apt/sources.list"(NoPermissions (FileSystemError): Error: EACCES: permission denied, open '/etc/apt/sources.list')

Why is that? Why I can't save this file??? Please tell me or repair this bug.

Does this issue occur when you try this locally?: Yes
Does this issue occur when you try this locally and all extensions are disabled?: Yes

[aeschli]

duplicate of #1688