Question

I know there is tons of posts on this but they are all about specific problems that I didn’t understand what is left, right and anything

I have 2 lists: left and right. I need to select all elements in left that are not in right.

List<T> left = GetLeft();
List<T> right = GetRight();

IEnumerable result = // Have no idea

How do I do this?

Answer 1

That doesn’t sound like a join at all… that sounds like:

var result = left.Except(right);