How to compare the two DataTable by using LINQ?

[ppr (Peter Preuss)]

@keerthi_97
As this Post is a fork have a look on your origin post. Here I have provided a demo xaml to you

How to compare the 2 Excel by unique Element (EmpId)?

@keerthi_97 Find a demo XAML here: keerthi_97.xaml (11.4 KB) I did a setup with dummy data but it should match to your structure as close as possible The scenario of nonmatching rows or only new rows in Update Excel is initially incorporated. Let us know your feedback