Working on a project for work and I seem to be stuck on a concept. Basically I have 3 lists and want to return all possible combinations between them.

List 1 can have meta things. Like retail, wholesale (just examples but definitely more than just 2).

List 2 has a multiple categories in it. Like Shirts, jeans, socks. Etc. Each categories has a unique identifier. S for shirts, J for jeans. Etc

List 3 contains other misc info. Like taxable, nontax.

In theory I could have more lists but let's stick with this for now.

I need a list of all possible combinations between the lists. Ex: retail, shirt, taxable. Retail l, shirt, nontax. Whole, shirt, taxable, whole, shirt, nontax.

For some reason I was thinking of laying the data out like a binary tree and traversing to get all possible options for each thing from List A but that's not working in my brain.

Just curious as what methods you guys would go with? Working out of vb.net