Filter folders based on datatable

What is the best way to query a list of folders based on a Datatable values in a row?

I have a datatable DT1 with two colums. I would like to get only the directories/folders that are in this datatable row. AllDirectories is of the type String

AllDirectories = Directory.GetDirectories(ConfigPath + folderToCheck)

Thanks a lot.

@krisvandenbergh Can you show us the DatatableFormat, How the data is Organized, Are all the Directory names in a column or in a row?