SerializedProperty to UnityEvent

I am currently facing an issue in converting a SerializedProperty to a UnityEvent.

Thats how I declare it in the main script

Code (CSharp):

1. public UnityEngine.Events.UnityEvent EventToAdd;

And this is my Editorscript

Code (CSharp):

1. private SerializedProperty _Events;
2. private void OnEnable()
3.    {
4.        _Events = serializedObject.FindProperty("EventToAdd");
5.    }
6.  
7.  
8. public override void OnInspectorGUI()
9.    {
10. TwitchTVGui TGUI = (TwitchTVGui)target;
11.  
12.        this.serializedObject.Update();
13. EditorGUILayout.PropertyField(this.serializedObject.FindProperty("EventToAdd"), true);
14.            this.serializedObject.ApplyModifiedProperties();
15. }

And then I need to get the UnityEvent out of the serializedObject _Events

BR, Torben