How to recreate the same columns with different name with same exisitng column rows in same datable any method is ther linq like that kindly help

Need to create the Description column with his values with another name as Proj as shown in output

Name Value Description
Aravind Ram Chennai
Sekar Shan Pondy
Name Value Description Proj
Aravind Ram Chennai Chennai
Sekar Shan Pondy Pondy

Read your excel sheet then add data column to that datatable then in for each row assign row(""Description)=row(“proj”)

Is there easy way without looping bro like linq like that

Use Data Column Expression property