If you are using Powershell as a shell (and not as a script processor), you can simply type:
cmd /r dir /s /b
The /r flag tells cmd.exe to run the command and exit. In other words, you'll end at the same execution context.
For many commands, cmd /r is better than dealing with Powershell object-oriented architecture.
参考：https://stackoverflow.com/questions/1479663/how-do-i-do-dir-s-b-in-powershell/39459273