Question regarding Foreach loop with Listview Items

Here is my problem. I am sure it is probably something simple.

Say my listview has 6 items in it.

The problem I am running into is the whole last item #5 or 6 is not getting written out to the XML if I delete either #5 or 6 from the listview.  If I delete item 1-4 it works fine. When I delete 5 or 6 then the whole last block does not get written out.

The way my XML file should work is item 1+2 contain the same info minus 3 fields so they are linked as one. They are all paired up 3+4 and 5+6 What should happen is if I delete #5 the XML should show 1+2, 3+4, and 5 alone.

Can someone tell me what I am doing wrong in this loop. I have been working on it for a while.

         string[] PreviousRowArray = null;

         foreach (ListViewItem row in listViewFount.Items)
         {
            string CurrentRow = "";

            for (int i=0 ; i<row.SubItems.Count ;i++)
            {
               CurrentRow = CurrentRow + row.SubItems[i].Text + " ";
            }

            string[] CurrentRowArray = CurrentRow.Split(' ');
               
            if (PreviousRowArray != null)
            {
               if ((CurrentRowArray[1].ToString() == PreviousRowArray[1].ToString()) &&
                  (CurrentRowArray[1].ToString() == PreviousRowArray[1].ToString()))
               {
                  //Here I write out the CurrentRowArray information combined with
                  //the PreviousRowArray. Removed for ease of reading
                 
                  PreviousRowArray = null;
                  CurrentRowArray  = null;
               }
               else
               {
        //Here I write only the pervious line out to the
                  //XML file. Removed for ease of reading

                  PreviousRowArray  = CurrentRowArray;
               }
            }
            else//Move currentrow to previous

               PreviousRowArray = CurrentRow.Split(' ');
         }

         //this is the end of the document
         textwriter.WriteEndDocument();              
         textwriter.Flush();
         textwriter.Close();

      }