Powershell循环抛出MissingVariableNameAfterForeach

Question

为什么出现以下错误：“ MissingVariableNameAfterForeach”：

powershell.exe -NoProfile -ExecutionPolicy Bypass -Command "foreach($file in Get-ChildItem C:){((Get-Date)-$file.LastWriteTime).ToString('dd')}"

该命令应该打印出从今天开始在C：\中写入最后一个文件/文件夹的日期。

Answer 1

从帮助文本：

PS C:\> powershell.exe /?

If the value of Command is a script block, the script block must be enclosed
in braces ({}). You can specify a script block only when running PowerShell.exe
in Windows PowerShell.

powershell.exe -NoProfile -ExecutionPolicy Bypass -Command {Get-ChildItem C: | ForEach-Object{($_.LastWriteTime).ToString('dd')}}