LoadPrefab.cs

using UnityEngine;
namespace KL.Utils {
    public class LoadPrefab : MonoBehaviour {

        #pragma warning disable 0649
        [SerializeField] private GameObject prefab;
        [SerializeField] private bool inEditor = true;
        [SerializeField] private bool inRuntime = true;
        #pragma warning restore 0649

        void Awake() {
            if ((inRuntime && !Application.isEditor) || 
                    (inEditor && Application.isEditor)) {
                DoLoadPrefab();
            } 
            Destroy(gameObject);
        }

        private void DoLoadPrefab() {
            var loadedPrefab = Instantiate(prefab);
            loadedPrefab.transform.SetParent(transform.parent);
            loadedPrefab.transform.position = transform.position;
            loadedPrefab.transform.rotation = transform.rotation;
            loadedPrefab.transform.localScale = transform.localScale;
            loadedPrefab.name = prefab.name;
        }
    }
}