Powershell-我可以在条件中使用字符串作为对象吗？

考虑这种情况。我有多个域，并且正在编写一个涵盖所有域的脚本，以将用户添加到组中。我想做这样的事情：

# UserID selected earlier in the script
$SelectedUID = "testuser"
# These could contain any number of groups, or none at all
$CommonGroupsDomain1 = "Group1", "Group2"
$CommonGroupsDomain2 = "GroupX", "GroupY"
$CommonGroupsDomain3 = $null

# The current domain (selected earlier in the script)
$CurrentDomain = "Domain1"

If (($"CommonGroups$CurrentDomain")) {
    ($"CommonGroups$CurrentDomain") | ForEach-Object {
        Add-ADGroupMember -Identity $_ -Members $SelectedUser -Server $CurrentDomainController 
    }
}
Else {
    "No common groups for this domain"
}

那么，$CommonGroups$CurrentDomain是否有可能告诉PS将字符串添加作为对象名称？

这是一种替代的处理方式，但似乎有些笨拙：

$CommonGroups = $null
Switch ($CurrentDomain) {
    'Domain1' {
        $CommonGroups = $CommonGroupsDomain1
    }
    'Domain2' {
        $CommonGroups = $CommonGroupsDomain2
    }
    'Domain3' {
        $CommonGroups = $CommonGroupsDomain3   
    }
}

If ($CommonGroups) {
         Add-ADGroupMember -Identity $_ -Members $SelectedUser -Server $CurrentDomainController
     }
}