visual studio 2010 - hide duplicates in a group except last row in .rdlc vs2010 -

I am working in a .rdls versus 2010 report. A group is "Group 1" I am using HideDuplicates for this group HideDuplicates Hide all but first but I would like to hide all but the last row

Any suggestions?

Do not use HideDuplicates but your hidden property is Textbox / row.

Something can do something like this:

  = IIf (line number ("group 1") = count (field! OneOfYourYearFields.Value, "Group1"), false , True)