Problem to determine added or removed child

[Hamed]

Hi
i want to handle some evens such as when new child has been added to diagram or a child removed from diagram. to do this i found this article which explains how to accomplish this. but when i use this code, i think this events does not exists and i'm facing ptoblem.

here is link of article :
http://www.syncfusion.com/support/kb/166/How%20do%20I%20determine%20when%20a%20new%20symbol%20or%20shape%20has%20been%20added%20to%20or%20removed%20from%20the%20Diagram

and here is my code :
this.diagram1.Model.ChildrenChangeComplete += new Syncfusion.Windows.Forms.Diagram.NodeCollection.EventHandler(Model_ChildrenChangeComplete);

can anybody help me to solve this problem ?
i'm using v8.1.0
thanks in advance

[Pandi Murugan A]

Hi Hamed,

Thank you for your interest in Syncfusion Products and sorry for the inconvenience caused.

Could you please try our below online UG documentation to achieve you requirement?

http://help.syncfusion.com/ug_83/User%20Interface/Windows%20Forms/Diagram/Documents/howtodetectwhetheranewsymbolorshapehasbeenaddedremovedfromadiagram.htm

Regards,
Pandi Murugan A.