Hi All,

I am using C# in an application and am having some problems with a file becoming locked.

The piece of code does this,

while (true)
{
   Read a packet from a socket (with data in it to add to the file)
   Open a file
   Writes data to it
   Close a file
} 

But in the process the file becomes locked. I don't really understand how, we are are definately catching and reporting exceptions so I don't see how the file doesn't get closed every time.

My best guess is that something else is opening the file, but I want to prove it. Can someone please provide a piece of code to check whether the file is open and if so report what processid and threadid has the file open.

For example if I had this code,

StreamWriter streamWriter1 = new StreamWriter(@"c:\logs\test.txt");
streamWriter1.WriteLine("Test");
// code to check for locks??
StreamWriter streamWriter2 = new StreamWriter(@"c:\logs\test.txt");
streamWriter1.Close();
streamWriter2.Close();

That will throw an exception because the file is locked when we try and open it the second time. So where the comment is what could I put in there to report that the current app (process Id) and the current thread (thread Id) have the file locked?

Thanks.