modelBuilder.Entity<ServerModel>()
                .HasMany(x => x.Channels)
                .WithOne(x => x.Server)
                .HasForeignKey(channels => channels.server_id);
 
Code: C#

 
        public virtual List<ChannelModel> Channels { get; set; }
 
Code: C#

 
            WriteD(_server.access); //access
                WriteB(IPAddress.Parse(_server.ip_address).GetAddressBytes());
                WriteH(_server.port);
                WriteC(_server.type); //type server
                WriteH(_server.maxPlayer); //max count people
                WriteD(0); //online now
                foreach (var Channel in _server.Channels)
                {
                    WriteC(Channel.type);
                }
 
Code: C#

for (int i = 0; i + 2; i++);
{
                WriteD(_server.access); //access
                WriteB(IPAddress.Parse(_server.ip_address).GetAddressBytes());
                WriteH(_server.port);
                WriteC(_server.type); //type server
                WriteH(_server.maxPlayer); //max count people
                WriteD(0); //online now
                foreach (var Channel in _server.Channels)
                {
                    WriteC(Channel.type);
                }
}
Code: C#

 
public override void RunImpl()
        {
            using (var context = new PBDBContext())
            {
                Rank rank = RankSerializer.Load();
                var server = context.servers.Find(1); // или FindOrDefault с последующей проверкой на null
                [COLOR="Red"]var channel = context.channels.Find(1);[/COLOR]
                Client.SendPacket(new PROTOCOL_BASE_GET_SYSTEM_INFO_ACK(rank, server, channel));
            }
            Client.SendPacket(new PROTOCOL_BASE_NOTICE_ACK());
            Client.SendPacket(new PROTOCOL_BASE_URL_LIST_ACK());
            Client.SendPacket(new PROTOCOL_BASE_MAP_RULELIST_ACK());
            Client.SendPacket(new PROTOCOL_BASE_MAP_MATCHINGLIST_PART_1_ACK());
            Client.SendPacket(new PROTOCOL_BASE_MAP_MATCHINGLIST_PART_2_ACK());
        }
 
Code: C#