用C#编写的运行用电脑的串口程序，有初始化、打开、关闭、读取串口的功能并能够查找串口的状态显示DTR,DSR。-With C# Prepared to run the serial port of a computer program, there are initialization, open, closed, read the serial port function and be able to find the status display serial DTR, DSR.