why do we call the flush method of binarywriter in c#

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why do we call the flush method of the binarywriter before closing it.what does the flush method actually do and is it necessary to call the flush method of binarywriter before closing it.

Posted 12-Feb-13 1:52am

rtz87

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**Joezer BH** · Answer 1 · 2013-02-12T01:56:00

It clears all buffers for the current writer and causes any buffered data to be written to the underlying device.

NOTE: All derived classes should override Flush to ensure that all buffered data is sent to the stream.
Flushing the stream will not flush its underlying encoder unless you explicitly call Flush or Close. Setting AutoFlush to true means that data will be flushed from the buffer to the stream, but the encoder state will not be flushed. This allows the encoder to keep its state (partial characters) so that it can encode the next block of characters correctly. This scenario affects UTF8 and UTF7 where certain characters can only be encoded after the encoder receives the adjacent character or characters.

Cheers,
Edo

OriginalGriff · Answer 2 · 2013-02-12T01:58:00

Solution 2

You call Flush when you want to write the content to the stream without closing it - so that is can be read by another process (assuming you don't have an exclusive lock on the object at the other end of the stream) - it is not normally necessary to call it for most streams (with the exception of some encrypted streams where flushing is important).
Calling Close on a stream will automatically Flush the stream anyway.

Posted 12-Feb-13 1:58am

OriginalGriff

Comments

rtz87 12-Feb-13 8:24am

not exactly clear to me can u be more detailed on this with a possible example.

fjdiewornncalwe 12-Feb-13 9:18am

Why do you need an example. You simply call .Flush() on your stream, that is the code.

fjdiewornncalwe 12-Feb-13 9:17am

+5.