How do I create a group of radio buttons?

In Windows Forms, all RadioButton controls in a given container, such as a Form, constitute a group. To create multiple groups on one form, place each group in its own container, such as a GroupBox or Panel control.

Note that Windows Forms Radio buttons are odd animals They are more a "loose confederation" of individual controls rather than acting as a single control. You can't data drive the selection, because there is not a single value that represents the selection for the entire group. Each radio button in a group has its own Checked property which is either true or false. You may want to consider a combo box as an alternative to radio buttons.