PowerShell函数在DataTable中返回重复项

$dt = New-Object System.Data.DataTable
$dt.Columns.Add("Column1", [System.String]::typeid)  # 添加数据列
$dt.Columns.Add("Column2", [System.Int32]::typeid)

$row1 = $dt.NewRow()
$row1["Column1"] = "Value1"
$row1["Column2"] = 1
$dt.Rows.Add($row1)

$row2 = $dt.NewRow()
$row2["Column1"] = "Value2"
$row2["Column2"] = 2
$dt.Rows.Add($row2)

$row3 = $dt.NewRow()
$row3["Column1"] = "Value1"  # 重复的数据
$row3["Column2"] = 3
$dt.Rows.Add($row3)

$groups = $dt | Group-Object -Property "Column1"  # 根据Column1属性进行分组
$repeatedItems = $groups | Where-Object { $_.Count -gt 1 }  # 找出重复项

foreach ($item in $repeatedItems) {
    Write-Host "重复项: $($item.Name)"
    foreach ($row in $item.Group) {
        Write-Host "  - Column1: $($row["Column1"]), Column2: $($row["Column2"])"
    }
}