Filter results from a data table c#
ex: get unique  values of a coloumn ,

DataView view1 = new DataView(datatable1);

                        distinctValues1 = view1.ToTable(true, "user");
                        DataRow[] values1 = distinctValues1.Select(" ");
                        int numberofitems= values1.Count(); //this gives you count of unique rows
you can access info of that unique rows from values1 array .

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