var interfaceList = NetworkInterface.GetAllNetworkInterfaces();
      StringBuilder sb = new StringBuilder(512);
      int index = 0;
      string message = string.Empty;

      foreach(var item in interfaceList)
      {
        index++;

        sb.AppendLine(string.Format("Interface{0}: {1}", index, item.Name));
        sb.AppendLine(string.Format("Description: {0}", item.Description));
        sb.AppendLine(string.Format("ID: {0}", item.Id));
        sb.AppendLine(string.Format("Type: {0}", item.NetworkInterfaceType));
        sb.AppendLine(string.Format("OperationalStatus: {0}", item.OperationalStatus));
        sb.AppendLine(string.Format("IsReceiveOnly: {0}", item.IsReceiveOnly));
        sb.AppendLine(string.Format("Speed: {0}", item.Speed));
        sb.AppendLine(string.Format("SupportMulticast: {0}", item.SupportsMulticast));
        sb.AppendLine(string.Format("SupportIPV4: {0}", item.Supports(NetworkInterfaceComponent.IPv4)));

        sb.AppendLine(string.Format("IP Properties:"));
        var addresses = item.GetIPProperties().UnicastAddresses;
        int j = 0;
        foreach (var ip in addresses)
        {
          j++;
          sb.AppendLine(string.Format("Address{0}: {1}({2})", j, ip.Address.ToString(),ip.Address.AddressFamily));
          sb.AppendLine(string.Format("IPV4 Mask: {0}", ip.IPv4Mask));
          sb.AppendLine(string.Format("PrefixOrigin: {0}", ip.PrefixOrigin));
          sb.AppendLine(string.Format("SuffixOrigin: {0}", ip.SuffixOrigin));
          sb.AppendLine(string.Format("DuplicateAddressDetectionState: {0}", ip.DuplicateAddressDetectionState));
        }
        sb.AppendLine();
      }

      textBox1.Text = sb.ToString();