Unity - Only One Can Survive

OnlyOneCanSurvive.cs

using UnityEngine;

namespace PixelWizards.GameSystem.Controllers
{
    /// <summary>
    /// Lets us include specific prefabs in multiple scenes and make sure we don't end up with duplicates in the end
    /// sort of an inverse singleton pattern. Basically add this to a prefab, then add that prefab into any scene and 
    /// no matter what only one is ever active
    /// </summary>
    public class OnlyOneCanSurvive : MonoBehaviour
    {
        private void OnEnable()
        {
            // see if there are other contenders
            var obj = GameObject.FindObjectsOfType<OnlyOneCanSurvive>();
            if( obj.Length > 0)
            {
                for( var i = 0; i < obj.Length; i++)
                {
                    // if it's not 'us', then check and see if we're the same
                    if( obj[i].gameObject != this.gameObject)
                    {
                        // if there's already an object with this name, then we nuke ourselves
                        if( obj[i].name == this.gameObject.name)
                        {
                            Destroy(this.gameObject);
                        }
                    }
                }
            }
        }
    }
}