Delete duplicate lines

Hi guys, i’m trying to delete duplicated lines i have in my drawing, and i’m finding it extremely harder than i previously tought. These lines are made by exploding solids then regions to get the perimeter, and i always end with two lines in the same spot with inverse directions, and i REALLY can’t see a way of sorting this. Any ideas?

Nice, 5 min after posting and I got the solution hahaha

I think there is also an Overkill node in the Civil 3D Toolkit that you might try.