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SerialPort.CtsHolding Property

Gets the state of the Clear-to-Send line.

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

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

Property Value

Type: System.Boolean
true if the Clear-to-Send line is detected; otherwise, false.

ExceptionCondition
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

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

The Clear-to-Send (CTS) line is used in Request to Send/Clear to Send (RTS/CTS) hardware handshaking. The CTS line is queried by a port before data is sent.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0
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