我怎么能写从C＃服务的日志文件，这样它就会被刷新到磁盘及时？

How can I write a logfile from a C# service so that it gets flushed to disk in a timely fashion?

下面是我已经试过。在记录code，我打开一个文件是这样的：

Here's what I've tried. In logging code, I opened a file like this:

var file = return File.Open(name, FileMode.Append, 
                            FileAccess.Write, FileShare.Read);
var writer = new StreamWriter(file);

和写信给它这样的：

writer.WriteLine(msg);
writer.Flush();
file.Flush();

但是日志没有刷新到磁盘及时。所以，我想补充，这是否一个5秒钟的定时器：

However the log was not flushed to disk in a timely fashion. So I tried adding a 5-second timer that does this:

[DllImport("kernel32.dll")]
static extern bool FlushFileBuffers(IntPtr hFile);

file.Flush();
var hdl = file.SafeFileHandle;
FlushFileBuffers(hdl.DangerousGetHandle());

这似乎工作，但不经常，我得到了以下异常：

This appears to work, but at infrequent intervals I get the following exception:

System.IO.IOException: The OS handle's position is not what FileStream expected. Do not use a handle simultaneously in one FileStream and in Win32 code or another FileStream. This may cause data loss.

at System.IO.FileStream.VerifyOSHandlePosition()

有没有更好的方式来强制刷新？

Is there a better way to force the flush?

推荐答案

每这个答案，.NET 4.0下它的不够的，只是叫

Per this answer, under .NET 4.0 it's enough to just call

file.Flush(true)

瞎搞与P / Invoke调用不再需要。

Messing around with the p/Invoke call is no longer required.