Top 20 NuGet rs232 Packages

Qpick serialport connectivity. Recive and send data with RS232
Serial connector for Apollo13 projects
An independent implementation of System.IO.Ports.SerialPort and SerialStream for better reliability and maintainability.
C# Driver for CrystalFontz CFA533 family of 16x2 LCD displays, RS232 inteface; Developed against the CFA533-TMI-KU
SharpFish is a C# library for the Fischertechnik Serial Interface. It allows you to control and read inputs from your Fischer Inteface via RS232 port. Released under the MIT license.
RS232Helper is convenient to Use SerialPort.