SerialPort.BytesToRead Property
Gets the number of bytes of data in the receive buffer.
Namespace: System.IO.Ports
Assembly: System (in System.dll)
| Exception | Condition |
|---|---|
| InvalidOperationException | The port is not open. |
The receive buffer includes the serial driver's receive buffer as well as internal buffering in the SerialPort object itself.
Because the BytesToRead property represents both the SerialPort buffer and the Windows-created buffer, it can return a greater value than the ReadBufferSize property, which represents only the Windows-created buffer.
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.
