c# - PLINQ for DataTables -

is possible apply plinq next code:

            var query = x in table1.asenumerable()             join y in table2.asenumerable() on              x.field<string>("field1").tolower() equals              y.field<string>("field1").tolower()             (x.field<bool>("field2") == false)             select x;              foreach (var row in query)             row.setfield<bool>("field2", true); 

any improving advances appreciated lot.