I already did the first part. I need to do the second part now. Please find attached the project and the data below.
Thanks! CompareExcelFile.zip (20.3 KB)
you can get the result you want using the following code, however you will need to rename the result column and then replace the values in the second column for the one that you need, in your case “To be check” do this within a for each row activity
dt_Excel1.AsEnumerable().Where(Function(row) Not dt_Excel2.AsEnumerable().Select(Function(r) r(0).ToString).Any(Function(x) x = row(0).ToString)).CopyToDataTable()