Specifies the type of change that occurred on the SerialPort object.
Assembly: System (in System.dll)
|A break was detected on input.|
|The Carrier Detect (CD) signal changed state. This signal is used to indicate whether a modem is connected to a working phone line and a data carrier signal is detected.|
|The Clear to Send (CTS) signal changed state. This signal is used to indicate whether data can be sent over the serial port.|
|The Data Set Ready (DSR) signal changed state. This signal is used to indicate whether the device on the serial port is ready to operate.|
|A ring indicator was detected.|
This enumeration is used with the PinChanged event.
A serial port pin changes state when it is asserted or unasserted.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)