Another of the peculiarities of Windows Forms is that the RadioButton control doesn't support double clicking. Granted, it is not often you require the functionality but it's a little odd it's not supported.
As an example, one of our earlier products which never made it to production uses a popup dialog to select a zoom level for a richtext box. Common zoom levels are provided via a list of radio buttons. Rather than the user having to first click a zoom level and then click the OK button, we wanted the user to be able to simply double click an option to have it selected and the dialog close.Read More