winutil/functions/private/Set-WinUtilDNS.ps1

function Set-WinUtilDNS {
    <#
    
        .DESCRIPTION
        This function will set the DNS of all interfaces that are in the "Up" state. It will lookup the values from the DNS.Json file

        .EXAMPLE

        Set-WinUtilDNS -DNSProvider "google"
    
    #>
    param($DNSProvider)
    if($DNSProvider -eq "Default"){return}
    Try{
        $Adapters = Get-NetAdapter | Where-Object {$_.Status -eq "Up"}
        Write-Host "Ensuring DNS is set to $DNSProvider on the following interfaces"
        Write-Host $($Adapters | Out-String)

        Foreach ($Adapter in $Adapters){
            if($DNSProvider -eq "DHCP"){
                Set-DnsClientServerAddress -InterfaceIndex $Adapter.ifIndex -ResetServerAddresses
            }
            Else{
                Set-DnsClientServerAddress -InterfaceIndex $Adapter.ifIndex -ServerAddresses ("$($sync.configs.dns.$DNSProvider.Primary)", "$($sync.configs.dns.$DNSProvider.Secondary)")
            }
        }
    }
    Catch{
        Write-Warning "Unable to set DNS Provider due to an unhandled exception"
        Write-Warning $psitem.Exception.StackTrace 
    }
}