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Trace.Flush Method

Flushes the output buffer, and causes buffered data to be written to the Listeners.

Namespace:  System.Diagnostics
Assembly:  System (in System.dll)
[ConditionalAttribute("TRACE")]
public static void Flush()

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.

The following example creates a TextWriterTraceListener named myTextListener. myTextListener uses a StreamWriter called myOutputWriter to write to a file named TestFile.txt. The example creates the file, stream and text writer, writes one line of text to the file, and then flushes and closes the output.


// Specify /d:TRACE when compiling.

using System;
using System.IO;
using System.Diagnostics;

class Test
{
    static void Main()
    {
        // Create a file for output named TestFile.txt.
        using (FileStream myFileStream = 
            new FileStream("TestFile.txt", FileMode.Append))
        {
            // Create a new text writer using the output stream 
            // and add it to the trace listeners.
            TextWriterTraceListener myTextListener = 
                new TextWriterTraceListener(myFileStream);
            Trace.Listeners.Add(myTextListener);

            // Write output to the file.
            Trace.WriteLine("Test output");

            // Flush and close the output stream.
            Trace.Flush();
            Trace.Close();
        }
    }
}


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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