param(
    [Parameter(Mandatory)]
    $oldObject,

    [Parameter(Mandatory)]
    $newObject
)

$result = $oldObject.PSObject.Properties.Name | ForEach-Object {

    $prop = $_

    $oldValue = $oldObject.$prop
    $newValue = $newObject.$prop

    # null または単純値のみ対象
    # IsPrimitive は Boolean、Int32、Int64、Double など
    $isSimple =
        $null -eq $oldValue -or
        $oldValue.GetType().IsPrimitive -or
        $oldValue -is [string] -or
        $oldValue -is [decimal] -or
        $oldValue -is [datetime] -or
        $oldValue -is [timespan] -or
        $oldValue -is [guid] -or
        $oldValue.GetType().IsEnum

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

    # ----------------------------------------
    # Get-VMHost の例外
    # コレクション型プロパティ
    # ----------------------------------------
    switch ($prop) {
        'InternalNetworkAdapters' {
            $oldText = @($oldValue).Count
            $newText = @($newValue).Count
        }
        'ExternalNetworkAdapters' {
            $oldText = @($oldValue).Count
            $newText = @($newValue).Count
        }
        'SupportedVmVersions' {
            $oldText = (
                @($oldValue) |
                ForEach-Object { $_.ToString() } |
                Sort-Object
            ) -join ','
            $newText = (
                @($newValue) |
                ForEach-Object { $_.ToString() } |
                Sort-Object
            ) -join ','
        }
        'SecureBootTemplates' {
            $oldText = (
                @($oldValue) |
                ForEach-Object { $_.Id.ToString() } |
                Sort-Object
            ) -join ','
            $newText = (
                @($newValue) |
                ForEach-Object { $_.Id.ToString() } |
                Sort-Object
            ) -join ','
        }
        'GuestIsolationTypes' {
            $oldText = (
                @($oldValue) |
                ForEach-Object { $_.ToString() } |
                Sort-Object
            ) -join ','
            $newText = (
                @($newValue) |
                ForEach-Object { $_.ToString() } |
                Sort-Object
            ) -join ','
        }
        default {
            # HostNumaStatus / NumaStatus は除外
            return
        }
    }
    if ($oldText -ne $newText) {
        [pscustomobject]@{
            Property = $prop
            OldValue = $oldText
            NewValue = $newText
        }
    }
    # ----------------------------------------
    # Get-VMHost の例外終わり
    # ----------------------------------------
}

$result