C# 2010 System.net how to change nic configuration settings

/// <summary>/// Returns the list of Network Interfaces installed
/// </summary>
/// <returns>Array list of string</returns>
public static ArrayList GetNICNames()
{
	ArrayList nicNames = new ArrayList();

	ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
	ManagementObjectCollection moc = mc.GetInstances();

	foreach(ManagementObject mo in moc)
	{
		if((bool)mo["ipEnabled"])
		{
			nicNames.Add( mo["Caption"] );
		}
	}

	return nicNames;
}

public static void SetDNS(string nicName, string DnsSearchOrder)
        {
            ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
            ManagementObjectCollection moc = mc.GetInstances();

            foreach (ManagementObject mo in moc)
            {
                // Make sure this is a IP enabled device. Not something like memory card or VM Ware
                if ((bool)mo["IPEnabled"])
                {
                    if (mo["Caption"].Equals(nicName))
                    {

                        ManagementBaseObject newDNS = mo.GetMethodParameters("SetDNSServerSearchOrder");

                        newDNS["DNSServerSearchOrder"] = DnsSearchOrder.Split(',');

                        ManagementBaseObject setDNS = mo.InvokeMethod("SetDNSServerSearchOrder", newDNS, null);

                        break;
                    }
                }
            }

/// <summary>
/// Set IP for the specified network card name
/// </summary>
/// <param name="nicName">Caption of the network card</param>
/// <param name="IpAddresses">Comma delimited string containing one or more IP</param>
/// <param name="SubnetMask">Subnet mask</param>
/// <param name="Gateway">Gateway IP</param>
/// <param name="DnsSearchOrder">Comma delimited DNS IP</param>
public static void SetIP( string nicName, string IpAddresses, string SubnetMask, string Gateway, string DnsSearchOrder)
{
	ManagementClass mc = new ManagementClass("Win32_NetworkAdapterConfiguration");
	ManagementObjectCollection moc = mc.GetInstances();

	foreach(ManagementObject mo in moc)
	{
		// Make sure this is a IP enabled device. Not something like memory card or VM Ware
		if( (bool)mo["IPEnabled"] )
		{
			if( mo["Caption"].Equals( nicName ) )
			{

				ManagementBaseObject newIP = mo.GetMethodParameters( "EnableStatic" );
				ManagementBaseObject newGate = mo.GetMethodParameters( "SetGateways" );
				ManagementBaseObject newDNS = mo.GetMethodParameters( "SetDNSServerSearchOrder" );
						
				newGate[ "DefaultIPGateway" ] = new string[] { Gateway };
				newGate[ "GatewayCostMetric" ] = new int[] { 1 };

				newIP[ "IPAddress" ] = IpAddresses.Split( ',' );
				newIP[ "SubnetMask" ] = new string[] { SubnetMask };

				newDNS[ "DNSServerSearchOrder" ] = DnsSearchOrder.Split(',');

				ManagementBaseObject setIP = mo.InvokeMethod( "EnableStatic", newIP, null);
				ManagementBaseObject setGateways = mo.InvokeMethod( "SetGateways", newGate, null);
				ManagementBaseObject setDNS = mo.InvokeMethod( "SetDNSServerSearchOrder", newDNS, null);

				break;
			}
		}
	}
}