Compile Error When Setting Custom onFinished()

[gretty]

Hello

Why cant I specify my own custom on finished method that will execute when a TweenScale has completed? I am getting the compile error:

Operator `+=' cannot be applied to operands of type `System.Collections.Generic.List<EventDelegate>' and `method group'

Heres my simple code:

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class CircularMenu : MonoBehaviour {
5.  
6.         private void OnEnable() {
7.                
8.                 GetComponent<TweenScale>().onFinished += onScaleFinished;  // Compile error: Operator `+=' cannot be applied to operands of type `System.Collections.Generic.List<EventDelegate>' and `method group'
9.         }
10.        
11.         private void OnDisable() {
12.                
13.                 GetComponent<TweenScale>().onFinished -= onScaleFinished;
14.         }
15.        
16.         private void onScaleFinished(GameObject go) {
17.  
18.         }
19. }
20.  

[ArenMook]

EventDelegate.Add(GetComponent<TweenScale>().onFinished, onScaleFinished);