Based on the limited amount of information you have supplied I would say you need to create a class that has fields to represent the column and the value. You then create instances of this class and add them to your collection.
A couple of things to consider spring to mind
1. Wouldn't a column have more than one value in it ? How are you going to handle this ?
2. How will you need to access the values after you have created them ? The answer to this will point you towards what sort of collection to use.