Get unique data from datatable with remaining data of respective columns

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Hi Friends,
From datatable i need to take unique value based on four column names so that i am using following code:-
dt_finalOutput.DefaultView.ToTable(True,“TranDate”,“Order”,“Details”,“PO”)
if i am using this i got output from only specific column but i want the output from specific column as well as remaining data of respective columns
so how to achieve this.

Thanks