Thanks for your reply, I have figured out on adding expression column another way but now having difficulty to get the correct out put . any bit of info would be helpful
Code:
Dim dt As New DataTable
dt.Columns.Add("col1")
dt.Columns.Add("col2")
dt.Columns.Add("col3")
dt.Columns.Add("col4")
dt.Columns.Add("total")
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