private static bool IsFile(ref Kernel32.WIN32_FIND_DATA findData)
 {
     return((findData.dwFileAttributes & FileAttributes.Directory) == 0);
 }
 private static ulong GetSizeByHandle(ref Kernel32.WIN32_FIND_DATA findData)
 {
     return(IsFile(ref findData) ? (findData.nFileSizeHigh * (((ulong)uint.MaxValue) + 1)) + findData.nFileSizeLow : 0);
 }