Create a new CSV file with the differences between two tables

[ppr (Peter Preuss)]

@Maria_Cabrera
Welome to the forum.

I do assume that the csv are already in a datatable and for the duplate deteection all columns are to check.
So have a look here:

[HowTo] - Find Duplicate / NonDuplicate rows - checking all columns - without explicit listing the colnames/index

Introduction In the majority of scenarios duplicated / Non duplicated rows can be identified by a few columns grace to the key column concept. In order to retrieve it, the group by approach helps It can be done e.g. with some nice components from Connect or LINQ In some scenarios all duplicated / non duplicated rows should be detected by checking all columns. Setting up an approach without explicit listing all column names or column index would speed up the implementation. Implementat…

If only a little no of cols are to check if it makes a duplicate then let me know and I can share some other demo with you