Network Interface details using .Net

I want to show All my PC's IP Addresses with their subnet masks. this .net don't have any property called subnet mask but it has IPv4Mask property that i used.


 NetworkInterface[] Interfaces = NetworkInterface.GetAllNetworkInterfaces();
            foreach (NetworkInterface Interface in Interfaces)
            {
                if (Interface.NetworkInterfaceType == NetworkInterfaceType.Loopback) continue;
                Console.WriteLine(Interface.Description);
                UnicastIPAddressInformationCollection UnicastIPInfoCol = Interface.GetIPProperties().UnicastAddresses;
                foreach (UnicastIPAddressInformation UnicatIPInfo in UnicastIPInfoCol)
                {
                    Console.WriteLine("\tIP Address is {0}", UnicatIPInfo.Address);
                    Console.WriteLine("\tSubnet Mask is {0}", UnicatIPInfo.IPv4Mask);
                }
            }