Now I use LINQ as below. DT_TextFile.AsEnumerable().ToList().ForEach(Sub(row) row("APFNME")= row("APFNME").ToString+"-"+row("APLNME").ToString) I want to add another column for update Update Column FPP by calculate Column FPP /(divide) Column Case Update Column APSUM by calculate Column APSUM…

Hi @fairymemay Why you need to delete the column? Have a look on the thread [image] Learning LINQ: Remove Rows based on values from two columns Help try updated statement again Regards Gokul

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Gokul001 (Gokul Balaji) March 28, 2022, 4:38am 8

Hi @fairymemay

Why you need to delete the column?

Have a look on the thread

Regards
Gokul

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