How would you convert this JavaScript code into C#?

I'm following a tutorial from the Walker Boys, specifically this tutorial: http://vimeo.com/album/1546437/video/20685640

This is the code that I have been trying to convert (which is all inside a static void MakePrefabs function):

 var selectedObject : GameObject[] = Selection.gameObjects;
 Debug.Log(selectedObject[0].name);

I will provide all the examples that I have tried along with the errors they generate in that order. Straight code conversion:

 GameObject[] selectedObject = Selection.gameObjects;
 Debug.Log(selectedObject[0].name);

 IndexOutOfRangeException: Array index is out of range.

This makes sense due to the fact that I didn't specify the amount of indexes I wanted in the array. Specifying the array index amount:

 GameObject[] selectedObject = new GameObject[1];
 Debug.Log(selectedObject[0].name);

 NullReferenceException: Object reference not set to an instance of an object

This shows that I didn't specify the fact that I wanted to grab the selected gameObjects. In my attempts to do this, I have tried to use both temp variables and lists; I will provide both examples. Using a temp variable:

 GameObject[] selectedObject = new GameObject[1];
 GameObject[] _tmp = Selection.gameObjects;
 _tmp = selectedObject;
 Debug.Log(selectedObject[0].name)

 NullReferenceException: Object reference not set to an instance of an object.

This is also not grabbing the gameObjects. I have also tried it this way:

 GameObject[] selectedObject = new GameObject[1];
 GameObject[] _tmp = Selection.gameObjects;
 selectedObject = _tmp;
 Debug.Log(selectedObject[0].name);

 IndexOutOfRangeException: Array index is out of range.

This is the attempt using a List:

 List<GameObject> selectedObject = new List<GameObject>();
 selectedObject.Add(new GameObject());
 Debug.Log(selectedObject[0].name);

This "works" as it creates a new GameObject() and returns it; however, I only want to return the game objects that are already in the Hierarchy which at this point, is a Cube object.

TL;DR

Here is the full script and all the attempts that I have tried to convert this code in from JavaScript to C#:

 // JS code that I'm trying to convert
 var selectedObject : GameObject[] = Selection.gameObjects;
 Debug.Log(selectedObject[0].name);

 using UnityEngine;
 using UnityEditor;
 using System.Collections;
 using System.Collections.Generic;
 
 public class MakePrefab : MonoBehaviour {
 
     [MenuItem ("Project Tools/Make Prefabs #%&_p")]
 
     static void MakePrefabs() {
         // Attempt 1
         GameObject[] selectedObject = Selection.gameObjects;
         Debug.Log(selectedObject[0].name);
 
         // Attempt 2
         GameObject[] selectedObject = new GameObject[1];
         Debug.Log(selectedObject[0].name);
 
         // Attempt 3
         GameObject[] selectedObject = new GameObject[1];
         GameObject[] _tmp = Selection.gameObjects;
         selectedObject = _tmp;
         Debug.Log(selectedObject[0].name);
 
         // Attempt 4
         List<GameObject> selectedObject = new List<GameObject>();
         selectedObject.Add(new GameObject());
         Debug.Log(selectedObject[0].name);
     }
     
 }

Any input or tips would be GREATLY appreciated as I have been trying to figure this out for a long time now. Thank you for your time.