How do we compare elements in two lists in a Where Clause (Linq)

Question

class objA
{
    public Rectangle area;    
}

class objB
{
    public Point somepoint;
}


List<objA> listA;
List<objB> listB;

Now, I want to get the elements in listA and listB wherever objA.area.contains(objB.point)

Answer 1

This should do the trick:

result = listA.Select(a=>
new{ 
    Rectangle = a, 
    Points =listB.Where(b=>a.Contains(b))
});

Answer 2

You might consider doing a from from where style query, which is also called a non-equi join:

from rect in listA
from point in listB
where rect.Area.Contains(point.SomePoint)
select new { rect, point }