I am testing Syncfusion's GridGroupingControl with LLBLGen collections (which are custom collections that implement ICollection, IEnumerable, IList, IListSource, ISerializable, IXmlSerializable, IDisposable and IComponent). In VS2005 design time when I select such a collection to bind to a Syncfusion GridGroupingControl I get the error shown in the attached screen-capture inside VS and then my system seems to go into some sort of an infinite loop that I have to kill my VS session.
Error55.zip