To answer your question, you’re going to do something similar to what you would do if you were searching for the information to do something with it like in this case: Using inequality functions in my conditional code
However, what you are doing is likely not the best way. Instead, you probably want to use a Dictionary<String, String> as that will be the fastest, most efficient means of storing and retrieving the data. Otherwise you’re having to iterate through an unsorted list, which is super slow. I would only suggest the DataTable way if you were planning on using the results as your TransactionData to create new TransactionItems to fill out the second column in the ReFramework if you are sure you have to go through that DataTable one at a time in order.