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.NET Development
.NET Framework 3.5
System.IO Namespace
Stream Class
Stream Methods
 Flush Method

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This page is specific to
Microsoft Visual Studio 2008/.NET Framework 3.5

Other versions are also available for the following:
.NET Framework Class Library
Stream..::.Flush Method

When overridden in a derived class, clears all buffers for this stream and causes any buffered data to be written to the underlying device.

Namespace:  System.IO
Assembly:  mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public MustOverride Sub Flush
Visual Basic (Usage)
Dim instance As Stream

instance.Flush()
C#
public abstract void Flush()
Visual C++
public:
virtual void Flush() abstract
JScript
public abstract function Flush()
ExceptionCondition
IOException

An I/O error occurs.

For an example of creating a file and writing text to a file, see How to: Write Text to a File. For an example of reading text from a file, see How to: Read Text from a File. For an example of reading from and writing to a binary file, see How to: Read and Write to a Newly Created Data File.

Override Flush on streams that implement a buffer. Use this method to move any information from an underlying buffer to its destination, clear the buffer, or both. Depending upon the state of the object, you might have to modify the current position within the stream (for example, if the underlying stream supports seeking). For additional information see CanSeek.

When using the StreamWriter or BinaryWriter class, do not flush the base Stream object. Instead, use the class's Flush or Close method, which makes sure that the data is flushed to the underlying stream first and then written to the file.

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, Xbox 360, Zune

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, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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