Error in Editor Scripting Tutorial

I found this code in the Editor Scripting Tutorial.

Code (CSharp):

1. public class NameBehaviour : MonoBehaviour
2. {
3.     public string Name;
4.  
5.     [ContextMenu("Reset Name")]
6.     private static void ResetName()
7.     {
8.         Name = string.Empty;
9.     }
10. }

Error on line 8: An object reference is required for the non-static field, method, or property 'NameBehaviour.Name'