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# 找資料夾
Where-Object {$_.PsIsContainer -eq $true}

# 找檔案
Where-Object {$_.PsIsContainer -eq $false}

# 找檔案數 = n
Where-Object {$_.GetFiles().Count -eq n}

# 找資料夾數 = n
Where-Object {$_.GetDirectories().Count -eq n}