I get this problem every time I add the Accordion control to my project. I am using SyncFusion Essential Studio 14.1.0.41, This happens shortly after I add the control, it looks fine for about a minute then freezes and locks up visual studio. Let me know if you need any other info. I would attached the project or a sample project but once I kill VS and relaunch it acts like I never added the control and have to re-add it only for the same issue to occur.