When a property has a TypeConverter which method GetStandardValuesExclusive returns false. Users should be able to enter additional values, other than the values returned by the GetStandardValues mehtod.

When setting multiple objects or a mix of objects, some of which implement the INotifyPropertyChanged interface changes in these objects should be reflected in the RadPropertyGrid.

1. Drag a new RadPropertyGrid to a form.
2. Set the selected object property to any object
3. Add an event handler for the PropertyValueChanged event and add code in it that sets the same object as selected object of the property grid.
4. You will get a NullReferenceException

Steps to reproduce.

1. Drag a RadPropertyGrid to a form.
2. Set the selected object to a button for example.
3. Set the System.Threading.Thread.CurrentThread.CurrentUICulture to bg-BG for example
4. Run the project and try to edit the Size property. You will see that it is displayed in the format X;Y, but you have to enter string in the X,Y format otherwise you get an exception.

When the spin editor is opened in the RadPropertyGrid the default min and max values should be the min and max values of the type of the property that is being edited.

Add the ability to handle collection items in the RadPropertyGrid.

ADD. RadPropertyGrid - add custom grouping functionality

Currently RadPropertyGrid does not handle the GetStandardValues method.