HELP - TextWriter.Insert

Hi,

With VS 2003 and VB .NET I am trying to add a dateTime to every line in a text file - and while the following code displays the results I expect on the console - it does not actually make the changes to the textFile. So my question is - how to I code for making the expected changes to the actual textFile?
Dim fName AsString = "C:\tvcFileIn.txt"

Dim dt As DateTime

dt = String.Format("{0:u}", Now())

Dim readLine As Stream
Dim sw As TextWriter

Dim sb As StringBuilder

readLine = File.OpenRead(fName)

sw = Console.Out

Dim sReader AsNew StreamReader(readLine)

Try

sReader.BaseStream.Seek(0, SeekOrigin.Begin)

While (sReader.Peek() > -1)

sb = New StringBuilder(sReader.ReadLine())

sb.Insert(0, dt & ",")

sw.WriteLine(sb.ToString)

EndWhile

sReader.Close()

Console.WriteLine("DONE")

Catch objE As Exception

Call handleExc("wwd", objE)

Finally

EndTry

EndSub

Thanks mb

This question should have been posted in the .NET area, since it pertains to .NET

Thanks - I reposted in .NET

mb