from and select in c# .net? -

possible duplicate:
from , select in c# .net?

can please tell me how specify particular column in select statement in following coding:

var combinedrows = dt1 in dsresults.tables[0].asenumerable()                       join dt2 in dsresults.tables[1].asenumerable() on             dt1.field<string>("methodname") equals dt2.field<string>("methodname")                       select new { dt1, dt2 };  datatable finaldt = new datatable("finaltable"); finaldt.columns.add(new datacolumn("sp", typeof(string))); finaldt.columns.add(new datacolumn("method", typeof(string))); finaldt.columns.add(new datacolumn("class", typeof(string))); finaldt.columns.add(new datacolumn("bllmethod", typeof(string))); datarow newrow = finaldt.newrow();            foreach (var row in combinedrows) {      datarow datarow = finaldt.newrow();     datarow.itemarray = row.dt1.itemarray;       finaldt.rows.add(datarow); } 

you refine select statemenet:

select new { dt1.sp, dt1.method, dt1.class } 

...etc