2.5D laser question C#

Hey, I'm trying to create a laser that goes from the player to the mouseposition.

After reading tons of threads and watching some video tutorials on 3D lasers I've come to this:

Code (CSharp):

1. line.enabled = true;
2.         Vector3 mousepos = Input.mousePosition;
3.         //mousepos.z = 0.0f;
4.         Vector3 mouseposWorld = Camera.main.ScreenToWorldPoint(mousepos);
5.         Vector3 direction = mousepos - transform.position;
6.  
7.  
8.         while (Input.GetButtonDown("Fire1"))
9.         {
10.             Ray2D ray = new Ray2D(transform.position, direction) ;
11.             line.SetPosition(0, ray.origin);
12.             line.SetPosition(1, ray.GetPoint(10));
13.  
14.             yield return null;
15.         }
16.         line.enabled = false;
17.     }

Result is that I can shoot a laser, but it always shoots in the direction of the middle of my screen.

 

ok i found it, seems like i was already close, but didnt completetly get how the screentoworldpoint worked