> var result = from person in people > where person.FirstName == "Grover" > select person; > > //var is of type IQueryable and the query has yet to be executed... > > result = result.Where(person => person.LastName=="Lipscomb"); > > //still IQueryable and it has not yet been executed... > > foreach (var person in result) > { > person.Ban(); > } > > //Now it has been executed since you enumerated the results. >Thanks for saving me typing it in Mike.