SerialPort.BreakState Property


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Gets or sets the break signal state.

Namespace:   System.IO.Ports
Assembly:  System (in System.dll)

public bool BreakState { get; set; }

Property Value

Type: System.Boolean

true if the port is in a break state; otherwise, false.

Exception Condition

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.


The stream is closed. This can occur because the Open method has not been called or the Close method has been called.

The break signal state occurs when a transmission is suspended and the line is placed in a break state (all low, no stop bit) until released. To enter a break state, set this property to true. If the port is already in a break state, setting this property again to true does not result in an exception. It is not possible to write to the SerialPort object while BreakState is true.

.NET Framework
Available since 2.0
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