Linq not in select on datatable

Question

Hi i\'ve got 2 data tables (bannedlist,countrylist), both contains list of country names and cods in columns cc and country. I am trying to do a query where i can select cou

Answer 1

You can use the Except() LINQ extension method like this:

var result = full.Except(banned);

However this will work fine with the default comparer of the contained type. Thus if you want to use a specific column like in your example, you might need another approach like:

from r in ccList
where !bannedCCList.Any(b => b["cc"] == r["cc"])
select r;

Using Except() implies the references are the same in both collections, which I think is not the case with Tables, or correct me if I'm wrong.