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Linq Syntax - Find Duplicates

I am writing a class in a VB.NET project which will compare data between two data sources.

I have two datatables (tblSource and tblDest)

I am looking for a generic 'Find Duplicates' Linq statement where I DO NOT KNOW the Key Columns at design time.

For example, the following will work if I know the table is going to have Columns called CusOrderID and CusOrderStore:

Dim duplicates = tblDest.AsEnumerable().GroupBy(Function(r) New With { _
                            Key .CusOrderID = r.Item("CusOrderID"), _
                            Key .CusOrderStore = r.Item("CusOrderStore") _
                        }).Where(Function(gr) gr.Count() > 1).[Select](Function(g) g.Key)

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But seeing at this is a generic class, I will not know these column names.

I would like help with amending the statement above to run off a DataColumn array variable instead. If that is possible.


.NET ProgrammingVisual Basic.NETLINQ Query

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8/22/2022 - Mon
Ioannis Paraskevopoulos

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Annoyingly I don't actually have a need for this any longer as the problem has been circumvented.

I haven't had a chance to look properly at the solution, but it does like the sort of thing I need so I'll give you the points. Sorry for the delay.
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