net-boot-server/DhcpServer/App/DhcpPacket.cs

using System.Linq;
using System.Net;

namespace DhcpServer
{
    public partial class DhcpPacket
    {
        public string ClientMacAddressHex => string.Join("-", ClientMacAddress.Select(p => p.ToString("X2")));

        internal void LoadClientEntry(ClientEntry entry)
        {
            if (entry.IpAddress != null) YourIpAddress = IPAddress.Parse(entry.IpAddress);
            if (entry.SubNetMask != null) SubNetMask = IPAddress.Parse(entry.SubNetMask);
            if (entry.GateWay != null) Router = IPAddress.Parse(entry.GateWay);
            if (entry.DnsServer != null) DnsServer = IPAddress.Parse(entry.DnsServer);
            if (entry.TftpServer != null) TftpServer = entry.TftpServer;
            if (entry.BootFileName != null) BootFileName = entry.BootFileName;
        }
    }
}