WPF: ComboBox with reset item

Question

I want to make a ComboBox in WPF that has one null item on the top, when this gets selected, the SelectedItem should be set to null (reset to default state). I\

Answer 1

Think about implementing a Null Object Pattern for the "None" combobox item and add this item to your items list. Then implement custom logic for saving null object in that class, or just check if selected item is of NullItem type.