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SerialPort.ReadBufferSize Property

Gets or sets the size of the SerialPort input buffer.

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

[BrowsableAttribute(true)]
public int ReadBufferSize { get; set; }

Property Value

Type: System.Int32
The buffer size, in bytes. The default value is 4096.

ExceptionCondition
ArgumentOutOfRangeException

The ReadBufferSize value set is less than or equal to zero.

InvalidOperationException

The ReadBufferSize property was set while the stream was open.

IOException

The ReadBufferSize property was set to an odd integer value.

The ReadBufferSize property ignores any value smaller than 4096.

Because the ReadBufferSize property represents only the Windows-created buffer, it can return a smaller value than the BytesToRead property, which represents both the SerialPort buffer and the Windows-created buffer.

.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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