---- Reported by gert.driesen@pandora.be 2007-08-23 07:27:34 MST ----

When using Mono, Directory.GetFiles returned an entry for the Windows 
pagefile but when using FileInfo to obtain information on the pagefile it 
reports that it does not exist.

This prevents the (Open/Save)FileDialog from listing entries of the root 
directory of a volume containing a pagefile.

To reproduce, compile and run the following code snippet on Windows:

using System;
using System.IO;

class Program
{
  static void Main ()
  {
    FileInfo fi = new FileInfo (@"c:\pagefile.sys");
    Console.WriteLine (fi.Exists);
    Console.WriteLine (fi.Attributes);
    Console.WriteLine (fi.FullName);
    Console.WriteLine (fi.Name);
    Console.WriteLine (fi.Length);
    Console.WriteLine (fi.LastAccessTime);
  }
}

Expected result:

The following or similar output is written to the console:
True
Hidden, System, Archive
c:\pagefile.sys
pagefile.sys
1610612736
23/08/2007 10:56:22

Actual result:

False
0
c:\pagefile.sys
pagefile.sys

Unhandled Exception: System.IO.FileNotFoundException: Could not find 
file "c:\pa
gefile.sys".
File name: "c:\pagefile.sys"
  at System.IO.FileInfo.get_Length () [0x00000]
  at (wrapper remoting-invoke-with-check) System.IO.FileInfo:get_Length ()
  at Program.Main () [0x00000]



---- Additional Comments From robertj@gmx.net 2007-08-25 09:24:10 MST ----

This is a known "issue" on NT: GetFileAttributesEx() (used by
MonoIO.GetFileStat()) demands read access for the queried
object.

A reliable way to do that is FindFirstFile(), which returns
the same infos like GetFileAttributesEx(), but never fails,
if the file exists.




---- Additional Comments From robertj@gmx.net 2007-08-25 09:26:59 MST ----

Forgot to mention that GetLastError () returns ERROR_SHARING_VIOLATION
after GetFileAttributesEx ("c:/pagefile.sys", ...)




---- Additional Comments From robertj@gmx.net 2007-08-25 10:22:15 MST ----

Created an attachment (id=172536)
bug-82545.diff




---- Additional Comments From robertj@gmx.net 2007-08-25 10:24:42 MST ----

The long an the short of it is still a patch ;-)




---- Additional Comments From robertj@gmx.net 2007-08-25 11:51:04 MST ----

Created an attachment (id=172537)
bug-82545-update.diff  - reworked patch


Imported an attachment (id=172536)
Imported an attachment (id=172537)

Unknown bug field "cf_op_sys_details" encountered while moving bug
   <cf_op_sys_details>Windows XP SP2</cf_op_sys_details>
Unknown operating system unknown. Setting to default OS "Other".