"Null Reference Error" when using a custom class as an array

Hey everyone!

I have been using a code that has a custom class in it and have come across a problem.

When this code is called at runtime:

 using UnityEngine;
 using System.Collections;
 
 [System.Serializable]
 public class CustomClass {
     public Transform aTransform;
     public string aName;
 }
 
 [System.Serializable]
 public class Test : MonoBehaviour {
 
     public CustomClass[] cClass;
     
     void Start () {
         cClass = new CustomClass[1];
         cClass[0].aName = "A new name";
     }
 }

I get this null reference error:

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

I fairly sure the problem is when I change the value of cClass to be of length 1, but I do not know how to fix the problem.

Can anyone give me a hand? Cheers.

-AJ