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BinaryReader.FillBuffer Method

Fills the internal buffer with the specified number of bytes read from the stream.

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

protected virtual void FillBuffer (
	int numBytes
protected void FillBuffer (
	int numBytes
protected function FillBuffer (
	numBytes : int
Not applicable.



The number of bytes to be read.

Exception typeCondition


The end of the stream is reached before numBytes could be read.


An I/O error occurs.


Requested numBytes is larger than the internal buffer size.

The internal buffer size is the larger value between 16 and the value returned by GetMaxByteCount for the specified encoding.

For a list of common I/O tasks, see Common I/O Tasks.

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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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