Create Mutliple Test Hyper-V VMs

$NameVM ="testserver"
$NumArray = (1..4)
foreach ($number in $numArray)

{
$srvname = $NameVM + $number
mkdir d:\foldername\$srvname
$path = "d:\foldername\" + $srvname + "\" + $srvname + ".vhdx"
write-host "Creating" $srvname
New-VM –name $srvname -NewVHDSizeBytes 20GB –MemoryStartupBytes 1024MB –NewVHDPath $path –SwitchName CorpNet01
Set-VMDvdDrive –VMName $srvname -Path D:\src\pathtoiso.ISO=
Start-VM –Name $srvname
}