#Get-VMHostの比較
$oldinv = Import-Clixml .\HyperVHost-Inventory-コンピューター名-XXXXXX-XXXXXX.xml
$newinv = Import-Clixml .\HyperVHost-Inventory-コンピューター名-YYYYYY-YYYYYY.xml
$oldVMhost = $oldinv.HyperV.VMHost
$newVMHost = $newinv.HyperV.VMHost
$properties = $oldVMhost.PSObject.Properties.name
foreach ($property in $properties) {

    $oldValue = $oldVMHost.$property
    $newValue = $newVMHost.$property
    $oldText = if ($null -eq $oldValue) { $null } else { $oldValue.ToString() }
    $newText = if ($null -eq $newValue) { $null } else { $newValue.ToString() }
    if ($oldText -ne $newText) {
        [pscustomobject]@{
            Property = $property
            OldValue = $oldText
            NewValue = $newText
        }
    }
}