C#串口通信源码，可直接使用。包括界面，串口号，波特率，校验位，数据位，停止位，接收和发送功能，自动发送，十六进制转换等功能，经过调试无任何问题。-C# serial communication source, can be used directly. Including interface, serial port number, baud rate, parity bit, data bits, stop bits, receive and send functions, automati