.NET is a free, cross-platform, open source developer platform for building many different types of applications.
https://dotnet.microsoft.com/en-us/learn/dotnet/what-is-dotnet
https://dotnet.microsoft.com/en-us/download/dotnet/6.0
The HttpClient factory is a pattern for configuring and retrieving named HttpClients in a composable way.
This package integrates IHttpClientFactory with the Polly library, to add transient-fault-handling and resiliency through fluent policies such as Retry,
Circuit Breaker, Timeout, Bulkhead Isolation, and Fallback.
https://www.nuget.org/packages/Microsoft.Extensions.Http.Polly/
https://github.com/App-vNext/Polly
SSH.NET is a Secure Shell (SSH-2) library for .NET, optimized for parallelism.
MailKit is a cross-platform mail client library built on top of MimeKit.
https://github.com/jstedfast/MailKit
https://github.com/jstedfast/MimeKit