TextWriter locking files

I have an ASP.Net project where I have taken all of the error logging and created a new VB.Net logging class.
In the ASP.net project I have a reference to the new VB.Net logging class.
I have a try catch block, in the catch I create a logging object and call the logging from there. This all works great.

The problem I am having is that after the first log is written, the log file is locked. The code for logging is the exact same as before (and it worked like a charm when it was in the same ASP.Net project). Now that it is a Class that is reference to, it some how keeps a lock on the file. Any ideas?

Sample code from Logging class where it opens the file and writes the text:


Dim FileWriter As TextWriter = File.AppendText(oLoggingProperties.LoggingFileName & ".txt")

FileWriter.WriteLine(sLevel & " Error Log " & Date.Now & " From Class - " & sClass & " Method - " & sMethod)

FileWriter.WriteLine(oException.Message)
FileWriter.WriteLine(oException.Source)
FileWriter.WriteLine(oException.StackTrace)
FileWriter.WriteLine(oException.TargetSite)
FileWriter.WriteLine("")
FileWriter.Close()

Sample code from the WebForm1.aspx.vb code behind file:
Try
... some code .....

Catch oException As Exception
Dim lLogging As Logging.Logging = New Logging.Logging()
lLogging.Log(oException, "Login", "btnLogin_Click", "Fatel")
Err.Clear()
End Try


Any ideas of how to make sure the file is closed?

Thanks

Try this...

Code:

---

Dim lLogging As Logging.Logging = New Logging.Logging()
lLogging.Log(oException, "Login", "btnLogin_Click", "Fatel")
Err.Clear()
lLogging.Dispose()

---

I am not thinking well tonight, so that might not work, but worth a try.

I did some research in the Help for .Net Framework. It says to ONLY implement the Dispose method through the IDisposable interface when you have Unmanaged code. How can I tell what is manageed and unmanaged? Is there some kind of grid that will tell me this?