New Script

public class OnCollisionEnter : MonoBehaviour {


    void Update() {

    }


    void OnCollisionEnter2D (Collision2D col)
        {
            // If the colliding gameobject is an Enemy...
            if(col.gameObject.tag == "Dangerous")
            {

                // Find all of the colliders on the gameobject and set them all to be triggers.
                Collider2D[] cols = GetComponents<Collider2D>();
                foreach(Collider2D c in cols)
                {
                    c.isTrigger = true;
                }

                // ... disable user Player Control script
                GetComponent<PlayerControllerScript>().enabled = false;
        }
    }
}