public void Encode(string filePath)
{
MemoryStream brickStream = new MemoryStream();
DataContractSerializer cellSerializer = new DataContractSerializer(typeof(List <OctreeEntry <Brick> >));
List <OctreeEntry <Brick> > leafNodes = octree.GetLeafEnumerator();
cellSerializer.WriteObject(brickStream, leafNodes);
FileStream fileStream = File.Create(filePath);
brickStream.Position = 0;
CompressionUtil.ZipToFile(brickStream, fileStream);
fileStream.Close();
brickStream.Close();
}