Welcome to the Treehouse Community
The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)
Looking to learn something new?
Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

ERKAN ÖZTÜRK
1,723 PointsHow to use linq query.Which library do i have to add?
Add library
using System.Collections.Generic;
using System.Linq;
namespace Treehouse.CodeChallenges
{
public class NumberAnalysis
{
private List<int> _numbers;
public NumberAnalysis(_numbers)
{
_numbers = new List<int> { 2, 4, 6, 8, 10 };
}
}
}
1 Answer

Steven Parker
216,136 PointsThe using statement you added is correct.
The problem is that you also modified the NumberAnalysis constructor to require an argument.
Just put the definition of NumberAnalysis back the way it was and you should pass task 1.