const string str = @" $ORIGIN example.com. ; designates the start of this zone file in the namespace $TTL 1h ; default expiration time of all resource records without their own TTL value example.com. IN SOA ns.example.com. username.example.com. ( 2007120710 1d 2h 4w 1h ) example.com. IN NS ns ; ns.example.com is a nameserver for example.com example.com. IN NS ns.somewhere.example. ; ns.somewhere.example is a backup nameserver for example.com example.com. IN MX 10 mail.example.com. ; mail.example.com is the mailserver for example.com @ IN MX 20 mail2.example.com. ; equivalent to above line, ""@"" represents zone origin @ IN MX 50 mail3 ; equivalent to above line, but using a relative host name example.com. IN A 192.0.2.1 ; IPv4 address for example.com  IN AAAA 2001:db8:10::1 ; IPv6 address for example.com ns IN A 192.0.2.2 ; IPv4 address for ns.example.com  IN AAAA 2001:db8:10::2 ; IPv6 address for ns.example.com www IN CNAME example.com. ; www.example.com is an alias for example.com wwwtest IN CNAME www ; wwwtest.example.com is another alias for www.example.com mail IN A 192.0.2.3 ; IPv4 address for mail.example.com mail2 IN A 192.0.2.4 ; IPv4 address for mail2.example.com mail3 IN A 192.0.2.5 ; IPv4 address for mail3.example.com"; var zone = DnsZoneFile.Parse(content);

var zone = await DnsZoneFile.LoadAsync(uri)

var zone = new DnsZoneFile(); zone.Records.Add(new AResourceRecord { Name = "www.example.com", Class = "IN", Ttl = TimeSpan.FromMinutes(15), Address = IPAddress.Parse("127.0.0.1") }); zone.Records.Add(new AResourceRecord { Name = "ftp.example.com", Class = "IN", Ttl = TimeSpan.FromMinutes(15), Address = IPAddress.Parse("127.0.0.1") }); Console.Write(zone.ToString());

Console.Write(zone.ToString("example.com"));