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SerialPort.IsOpen Property

Gets a value indicating the open or closed status of the SerialPort object.

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

[BrowsableAttribute(false)]
public bool IsOpen { get; }

Property Value

Type: System.Boolean
true if the serial port is open; otherwise, false. The default is false.

ExceptionCondition
ArgumentNullException

The IsOpen value passed is null.

ArgumentException

The IsOpen value passed is an empty string ("").

The IsOpen property tracks whether the port is open for use by the caller, not whether the port is open by any application on the machine.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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