Save Part From The Datatable Variable

we can do it with a group by.

Assign activity:
left side: TableList - Datatype: List(Of DataTable)
Right side:
(From d in YourDataTableVar.AsEnumerable
Group d by k=d(“Transaction Number”).toString.Trim into grp=Group
Select grp.CopyToDataTable).toList

also have a look here:

Retriving the distinct Transaction number we can do:

YourDataTableVar.AsEnumerable.Select(Function (x) x("Transaction Number").toString).Distinct().toList

and will reveive a list(Of String)