The RadioButtonList Web Control
The RadioButtonList control acts as a parent control for a collection of radio button list items. All child items of RadioButtonList are rendered by using a RadioButton control. A RadioButtonList control can have either no items or one item selected. The SelectedItem property returns the selected element as a ListItem object. However, you have no guarantee that only one item is selected at any given time. For this reason, be extremely careful when you access the SelectedItem property of a RadioButtonList control. Depending on the structure and flow of your code, the item returned could be a null object. A workaround that always shields you from unpleasant surprises is wrapping any call to SelectedItem in a
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