This is the latest AlexFTPS,a free FTP/FTPS client and class library for .net . It's written to overcome the limits of .Net's System.Net.FTPWebRequest in terms of FTPS support. See the original site @ http://ftps.codeplex.com or the repo that sourced this package https://github.com/StingyJack/FTPSClient for more details!
$ dotnet add package AlexFTPS.vNextNo README available.