How to find out file owner?

Hi,
The following code doesn't work for mapped drives:

using System;
using System.Text;
using System.Threading;
using System.Security.AccessControl;
using System.Security.Principal;
using System.IO;

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
FileInfo fi = new FileInfo(@"c:\boot.ini");
FileSecurity fs = fi.GetAccessControl();
IdentityReference ir = fs.GetOwner(typeof(NTAccount));
Console.WriteLine(ir.Value);
}
}
}

What should I do to make it work for mapped drives or UNC (like
\\10.0.61.22\c$\boot.ini)?

(Windows XP network; logged on using domain administrator account)

Thanks


.

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