SerialPort::CDHolding Property
.NET Framework (current version)
Gets the state of the Carrier Detect line for the port.
Assembly: System (in System.dll)
| Exception | Condition |
|---|---|
| IOException | The port is in an invalid state. - or - An attempt to set the state of the underlying port failed. For example, the parameters passed from this SerialPort object were invalid. |
| InvalidOperationException |
This property can be used to monitor the state of the carrier detection line for a port. No carrier usually indicates that the receiver has hung up and the carrier has been dropped.
.NET Framework
Available since 2.0
Available since 2.0
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