Writing to txt file with StreamWriter and FileStream

Question

I ran into something interesting when using a StreamWriter with a FileStream to append text to an existing file in .NET 4.5 (haven\'t tried any older f

Answer 1

It sounds like you did not flush the stream.

http://msdn.microsoft.com/en-us/library/system.io.stream.flush.aspx

It looks like StreamWriter writes to a buffer before writing to the final destination, in this case, the file. You may also be able to set the AutoFlush property and not have to explicitly flush it.

http://msdn.microsoft.com/en-us/library/system.io.streamwriter.autoflush.aspx

To answer your question, when you use the "using" block, it calls dispose on the StreamWriter, which must in turn call Flush.