Error when trying to create a button in the editor

Questions & Answers
1

Hey,

I have been following some tutorials for a game and when trying to create a button in the editor, I get the error:

Assets/UI/Editor/AutomaticVerticalSizeEditor.cs(9,30): error CS0115: `AutomaticVerticalSizeEditor.onInspectorGUI()’ is marked as an override but no suitable method found to override

This is the script:

using UnityEngine;
using UnityEditor;
using System.Collections;

[CustomEditor(typeof(AutomaticVerticalSize))]
public class AutomaticVerticalSizeEditor : Editor {


	public override void onInspectorGUI() {

		DrawDefaultInspector ();

		GUILayout.Button ("Test Button");

	}
}

This is the first time for me creating editor stuff so I really could use some help.

Thanks.

2

OnInspectorGUI with capital O.

Also:

 using UnityEngine;
 using UnityEditor;
 using System.Collections;
 
 [CustomEditor(typeof(AutomaticVerticalSize))]
 public class AutomaticVerticalSizeEditor : Editor {
 
 
     public override void OnInspectorGUI() {
 
         DrawDefaultInspector ();
 
         if(GUILayout.Button ("Test Button")){
               Debug.Log("clicked");
          }
 
     }
 }