Change current Vlan to new vlan

HI

I would like to change Vlan on my vms, I have so far the following

$vms=get-content "mytextfile"

foreach($vmguest in $vms)

{$netadapter = get-networkadapter -vm $vmguest

set-networkadapter -networkadapter $netadapter ...... here is where i am stuck

}

any help if I am in the right direction and if not, any help anyways