The sample attached by you belongs to Visual Studio 2008 containing .net framework version 3.5. We have modified the attached sample in Visual Studio 2013 with .net framework version 4.5.1. Please verify the attached sample in your side and let us know whether the reported error reproduced or not. Please refer to the below sample.
If the issue reproduced in the sample which is attached by us, please provide us more information about your actual requirement and screen shot of the reported error or video which will help us to analyze further and provide a better solution.
Naganathan K G
From: Tony Ponce
Sent: Tuesday, March 15, 2016 10:38 AM
To: Syncfusion Support <email@example.com>
Subject: RE: Syncfusion support community forum 123399, NodeSelected in diagram , has been updated.
Dear Support Syncfusion
attachment with application of what is required