Collider still be there after destroy in Unity5, why?

Hello,
I want to check, if two cylindrical gameObjects intersects.
In Unity 4.x it works fine with the following:

Code (csharp):

1.  
2.  
3.      // Create new Cylinder GameObject to hold the Collider:
4. GameObject trigger = GameObject.CreatePrimitive(PrimitiveType.Cylinder);
5. Destroy(trigger.GetComponent<Renderer>());
6. Destroy(trigger.GetComponent<Collider>());
7.  
8.      // add a mesh collider as convex collider to get collisions by other mesh colliders:
9. MeshCollider mc = (MeshCollider) trigger.AddComponent(typeof(MeshCollider));
10. mc.convex = true;
11. mc.isTrigger = true;
12.  
13.       // set the new trigger gameObject as child of this gameObject,
14. trigger.transform.parent = transform;
15.    // dummy code to resize. My originalcode is different but ok
16. trigger.transform.position = transform.position;
17. trigger.transform.localRotation = Quaternion.identity;
18. trigger.transform.localScale = Vector3.one;
19.  
20.      // add Ridigbody to get Colliders working
21. Rigidbody rb = (Rigidbody)trigger.AddComponent(typeof(Rigidbody));
22. rb.useGravity = false;
23. rb.isKinematic = true;
24.  
25.      // add TriggerReturnScript script that do OnTriggerEnter and SendMessage back to this GO
26. trigger.AddComponent(typeof(TriggerReturnScript));
27.  

This solution works very well. But not with Unity5 anymore.
A cylindrical MeshCollider is created like expected, in the size of my Objects. That works.
But they get collision like they have attached a Capsule Collider. Half a sphere on each end is looking out of the cylinder.
GetType(collider) also returns a capsule collider, but i destroyed them.
In scene view you see only the new created meshcollider in light green lines. You not see the capsule collider. I destroy it at top of the code, but it is still there for the physics.
In the Inspector there is also only the new meshcollider.
If i change the code, that i only set the collider (generated with the primitive cylinder) enabled=false, everything is ok.
But then i have two colliders attached, one mesh active and the capsule disabled.
Why is the collider still there after destroy in Unity5?

 

Didnt tryed it(and i cant right now..), but try using CapsuleCollider instead of the base class
Destroy(trigger.GetComponent<CapsuleCollider>();
Maybe im writing something stupid, never needed something like this

 

Thank you. Good idea.
Testet it. But no. Same Problem with this.