Try this
(
From row In DTr.AsEnumerable()
Let originalAmount = CInt(row("Column1"))
Let multipliedAmount = originalAmount * 3
Select multipliedAmount
).ToArray()
Try this
(
From row In DTr.AsEnumerable()
Let originalAmount = CInt(row("Column1"))
Let multipliedAmount = originalAmount * 3
Select multipliedAmount
).ToArray()