Copied from /g/

Hey /prog/ I asked /g/ this but they don't seem to know much about programming
Anyways
I'm learning the basics of C# and I'm wondering wtf this means:
byte[, ,][] localchunks = new byte[chunksizex / chunksize, chunksizey / chunksize, chunksizez / chunksize][];

Specifically the "byte[, ,]" and the "byte[chunksizex / chunksize, chunksizey / chunksize, chunksizez / chunksize]"

wtf is with the commas and forward slashes in the "[]" ??

>>1
I'm learning the basics of C#
No, you are not. Go and learn the basics of C# by reading a book.