System.Net.NetworkInformation.SystemUnicastIPAddressInformation.MarshalUnicastIpAddressInformationCollection C# (CSharp) Method

        internal static UnicastIPAddressInformationCollection MarshalUnicastIpAddressInformationCollection(IntPtr ptr)
        {
            UnicastIPAddressInformationCollection addressList = new UnicastIPAddressInformationCollection();

            while (ptr != IntPtr.Zero)
            {
                Interop.IpHlpApi.IpAdapterUnicastAddress addr = Marshal.PtrToStructure<Interop.IpHlpApi.IpAdapterUnicastAddress>(ptr);
                addressList.InternalAdd(new SystemUnicastIPAddressInformation(addr));
                ptr = addr.next;
            }

            return addressList;
        }

        internal SystemIPInterfaceProperties(Interop.IpHlpApi.FIXED_INFO fixedInfo, Interop.IpHlpApi.IpAdapterAddresses ipAdapterAddresses)
        {
            _adapterFlags      = ipAdapterAddresses.flags;
            _dnsSuffix         = ipAdapterAddresses.dnsSuffix;
            _dnsEnabled        = fixedInfo.enableDns;
            _dynamicDnsEnabled = ((ipAdapterAddresses.flags & Interop.IpHlpApi.AdapterFlags.DnsEnabled) > 0);

            _multicastAddresses = SystemMulticastIPAddressInformation.ToMulticastIpAddressInformationCollection(
                Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressInformationCollection(ipAdapterAddresses.firstMulticastAddress));
            _dnsAddresses     = Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressCollection(ipAdapterAddresses.firstDnsServerAddress);
            _anycastAddresses = Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressInformationCollection(
                ipAdapterAddresses.firstAnycastAddress);
            _unicastAddresses = SystemUnicastIPAddressInformation.MarshalUnicastIpAddressInformationCollection(
                ipAdapterAddresses.firstUnicastAddress);
            _winsServersAddresses = Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressCollection(
                ipAdapterAddresses.firstWinsServerAddress);
            _gatewayAddresses = SystemGatewayIPAddressInformation.ToGatewayIpAddressInformationCollection(
                Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressCollection(ipAdapterAddresses.firstGatewayAddress));

            _dhcpServers = new InternalIPAddressCollection();
            if (ipAdapterAddresses.dhcpv4Server.address != IntPtr.Zero)
            {
                _dhcpServers.InternalAdd(ipAdapterAddresses.dhcpv4Server.MarshalIPAddress());
            }

            if (ipAdapterAddresses.dhcpv6Server.address != IntPtr.Zero)
            {
                _dhcpServers.InternalAdd(ipAdapterAddresses.dhcpv6Server.MarshalIPAddress());
            }

            if ((_adapterFlags & Interop.IpHlpApi.AdapterFlags.IPv4Enabled) != 0)
            {
                _ipv4Properties = new SystemIPv4InterfaceProperties(fixedInfo, ipAdapterAddresses);
            }

            if ((_adapterFlags & Interop.IpHlpApi.AdapterFlags.IPv6Enabled) != 0)
            {
                _ipv6Properties = new SystemIPv6InterfaceProperties(ipAdapterAddresses.ipv6Index,
                                                                    ipAdapterAddresses.mtu, ipAdapterAddresses.zoneIndices);
            }
        }