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Example PowerShell Function that allows Null in an Integer Values
function Set-AdapterVlan
{
[CmdLetBinding()]
param
(
[Parameter(Mandatory = $true)]
$Adapter,
[Parameter(Mandatory = $true)]
[AllowNull()]
[Nullable[System.Int32]]
$VlanId
)
if ($null -eq $VlanId)
{
$Adapter | Set-VMNetworkAdapterVlan -Untagged
}
else
{
$Adapter | Set-VMNetworkAdapterVlan -VlanId $VlanId -Access
}
}
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