System.NullReferenceException HResult=0x80004003 Message=Object reference not set to an instance of an object. Source=mscorlib StackTrace: at System.DefaultBinder.BindToMethod(BindingFlags bindingAttr ...
at MS.Internal.Data.PropertyPathWorker.ReplaceItem(Int32 k, Object newO, Object parent) at MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(Int32 k ...