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

Input
Name Value Description
Aravind Ram Chennai
Sekar Shan Pondy
Output
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

@Aravinthan
Use Data Column Expression property

https://docs.microsoft.com/en-us/dotnet/api/system.data.datacolumn.expression?view=netframework-4.8