// http://stackoverflow.com/questions/8991192/check-filesize-without-opening-file-in-c
public override long GetSize()
{
using (var fh = LongPathFile.GetFileHandle(Path,
FileMode.Open, FileAccess.Read, FileShare.ReadWrite, FileOptions.None))
{
if (fh.IsInvalid)
{
throw LongPathCommon.GetExceptionFromLastWin32Error();
}
long size;
if (NativeMethods.GetFileSizeEx(fh, out size))
{
return(size);
}
throw LongPathCommon.GetExceptionFromLastWin32Error();
}
}
public override DateTimeOffset?GetLastModifiedTimeUtc()
{
if (!Exists())
{
return(null);
}
WIN32_FILE_ATTRIBUTE_DATA data;
if (!NativeMethods.GetFileAttributesEx(
Path.LongFullPath,
GET_FILEEX_INFO_LEVELS.GetFileExInfoStandard,
out data))
{
throw LongPathCommon.GetExceptionFromLastWin32Error();
}
var ft = data.ftLastWriteTime;
return(DateTime.FromFileTime((((long)ft.dwHighDateTime) << 32) + ft.dwLowDateTime));
}