This is a simple process to combine 2 csv files and export them to Excel. App.config contains the folder location. Asumptions: -The files contain the words 'sub_csv' or 'master_csv' in ReadFilesToList() class. -No validation for multiple files -Add fields to the Record class and add the binding in the classes below -Add Column headings for the data table in RecordListToDataTable() and StringListToDataTable() Additions in the future: -SQL 2 SQL tables -Csv 2 SQL tables -SQL to Blockchain :) Side notes: By no means is this perfect and these functions have been written a millions times. However it's a good 'starter for 10' for me and anyone else who combines lists -I know for a fact theres a generic way of adding tables to excel, but this explains the process well for learning.