private long readUnsignedInt(RandomAccessFileOrArray stream)
 {
     if (_isBigEndian)
     {
         return(stream.ReadUnsignedInt());
     }
     else
     {
         return(stream.ReadUnsignedIntLe());
     }
 }
 private static long readUnsignedInt(RandomAccessFileOrArray stream,
                                     bool isBigEndian)
 {
     if (isBigEndian)
     {
         return(stream.ReadUnsignedInt());
     }
     else
     {
         return(stream.ReadUnsignedIntLe());
     }
 }