writing a file to the root of the C drive?

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C#

file-system

Hi All,

I have an interesting issue with writing a text file to the C: drive using the command below:

if (!File.Exists(FileName))
{
    StreamWriter sw = new StreamWriter(FileName);
    sw.WriteLine(TextReplyTrim + "\n");
    sw.WriteLine();
    sw.Close();
}
else
{
    StreamWriter sw = File.AppendText(FileName);
    sw.WriteLine(TextReplyTrim + "\n");
    sw.WriteLine();
    sw.Close();
}

This works or at least appears to work on XP I copied it across to the Windows7 machine this morning. It complains about about permissions which my user account on my PC should have? I didn't notice this until I delete the file it was saving to as it got too scrambled it will up date (the Append will work) just not the create?
Glenn (Happy New Year all!)