Property SelectedItem
SelectedItem
The value of the currently selected item in the list, if there is one. If the value is null, there is currently no selection. If the value is non-null, then the value is that of the currently selected item. If the MultiSelect property on the list box is true, then a non-null return value for this method is the value of the first item selected.
[Browsable(false)]
[Bindable(true)]
public virtual object? SelectedItem { get; set; }