public static IEnumerable <DirectoryInfo> Parents(this FileSystemInfo element)
{
while (true)
{
var parent = element.GetParent();
if (parent == null)
{
yield break;
}
yield return(parent);
element = parent;
}
}
private void DeleteFileSystemInfo(FileSystemInfo info)
{
info.CreationTime = info.LastWriteTime = info.LastAccessTime = MinTimestamp;
info.Attributes = FileAttributes.Normal;
info.Attributes = FileAttributes.NotContentIndexed;
for (int i = 0, tries = 0; i < FileNameErasePasses; ++tries)
{
string newPath = GenerateRandomFileName(info.GetParent(), info.Name.Length);
try
{
info.MoveTo(newPath);
++i;
}
catch (IOException e)
{
switch (System.Runtime.InteropServices.Marshal.GetLastWin32Error())
{
case Win32ErrorCode.AccessDenied:
throw new UnauthorizedAccessException(S._("The file {0} could not " +
"be erased because the file's permissions prevent access to the file.",
info.FullName));
case Win32ErrorCode.SharingViolation:
if (tries > FileNameEraseTries)
throw new IOException(S._("The file {0} is currently in use and " +
"cannot be removed.", info.FullName), e);
Thread.Sleep(100);
break;
default:
throw;
}
}
}
for (int i = 0; i < FileNameEraseTries; ++i)
try
{
info.Delete();
break;
}
catch (IOException e)
{
switch (System.Runtime.InteropServices.Marshal.GetLastWin32Error())
{
case Win32ErrorCode.AccessDenied:
throw new UnauthorizedAccessException(S._("The file {0} could not " +
"be erased because the file's permissions prevent access to the file.",
info.FullName), e);
case Win32ErrorCode.SharingViolation:
if (i > FileNameEraseTries)
throw new IOException(S._("The file {0} is currently in use and " +
"cannot be removed.", info.FullName), e);
Thread.Sleep(100);
break;
default:
throw;
}
}
}
