Using LINQ to query dataset for Distinct

I just wanted to query (quickly) a dataset to get a distinct pair of values.
Heres a quick way of doing it

var distinctValues = (from row in dataSet.Tables[0].AsEnumerable()
           select new
                      {
                          SomeColumn1 = row["SomeColumn1"],
                          SomeColumn2 = row["SomeColumn2"]
                      }).Distinct().OrderBy(o=>o.SomeSolumn1).ToArray();