Lista con expresiones lambda

Hacer un distinct en listas

 nListaCircuitos = nListaCircuitos.OrderBy(Function(z) z.TN_COD_CIRCUITO).Distinct().ToList()
                        nListaCircuitos = nListaCircuitos.GroupBy(Function(x) x.TN_COD_CIRCUITO).[Select](Function(g) g.First()).ToList()

Cuando en el gridview esta paginado y se quiere obtener la fila

The problem is in the following line::

CommandArgument ='<%# Container.DataItemIndex%>'

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the command argument not reset itself every time when move from page to another page..

• The answer is ::(in the case of ListView):

CommandArgument ='<%# ((ListViewDataItem)Container).DisplayIndex%>'

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• The answer is :: (in the case of GridView):

CommandArgument='<%#((GridViewRow)Container).RowIndex%>'