How to get number of parts from STL file?

See more:

C#

Hi,
I have an binary format STL (STereoLithography) file, I have successfully read the file from c#.net and got the facets, I also got the count of triangles, volume of the part and surface area of the part and dimensions of the 3D object(Length,breadth,height).
But now the problem is how do I find the number of parts and layer thickness . Please help.