I am using the following query to pull a row from a datatable in memory. 

```
Dim results = _
   From myRow In exceldt.AsEnumerable() _
   Where myRow.Field(Of String)("Serial Number") = Row.Item("Serial Number") _
   Select myRow

resultrow = results.CopyToDataTable.Rows(0)

```

I need to get the index of the resultrow when it was part of exceldt. I can't seem to find anything on this. Suggestions?