Problem with List.Addrange

I was trying to create a dynamic array, apparently Unity does not like how I decided to type it. I tried it in a different script and it worked, but when I moved all the code to another script, Unity will not compile it.

So where is the problem and how can I resolve it in a way that allows me to do what I want?

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics;
 
 public class CSHARPCONTROLLER : MonoBehaviour {
 
     public bool in_prompt = false;
     public bool object_selected = false;
     public List<string> object_names;
     public List<GameObject> all_objects;
 
     void Start () {
 
         object_names = new List<string> ();
         all_objects = new List<GameObject> ();
 
     }
 
     public void AddName (GameObject object_added, string name) {
         all_objects.AddRange (object_added);
         object_names.AddRange (name);
         UnityEngine.Debug.Log (name);
     }
 }
 

The error it gives me is this, and highlights exactly the lines where I try to use "AddRange".

 Assets/Standard Assets/Script/CSHARPCONTROLLER.cs(27,29): error CS1502: The best overloaded method match for `System.Collections.Generic.List<UnityEngine.GameObject>.AddRange(System.Collections.Generic.IEnumerable<UnityEngine.GameObject>)' has some invalid arguments

it also gives this error

 Assets/Standard Assets/Script/CSHARPCONTROLLER.cs(27,29): error CS1503: Argument `#1' cannot convert `UnityEngine.GameObject' expression to type `System.Collections.Generic.IEnumerable<UnityEngine.GameObject>'