MailSystem is a suite of .NET components that provide users with an extensive set of email tools. MailSystem provides full support for SMTP, POP3, IMAP4, NNTP, MIME, S/MIME, OpenPGP, DNS, vCard, vCalendar, Anti-Spam (Bayesian , RBL, DomainKeys), Queueing, Mail Merge and WhoIs
Networking utilities and data mining for resolving this package will do
Lightning fast DNS operations
ISP Whois Lookups
Wake on Lan
and much more
Documentation at https://firewallapi.asp-waf.com/?topic=html/N-Walter.Net.Networking.htm
DoHoN (stylised ドホン) is a DNS over HTTPS client for .NET. It's simple, clean, fast, and supports both synchronous and asynchronous usage with caching (and respects TTLs!). It uses .NET Core 2.0 to provide cross-compatibility across multiple OSes. It uses the application/dns-json format.