if (RadioButtonList1.Items[0].Selected == true || RadioButtonList1.Items[1].Selected == true)
{
while(i >= RadioButtonList2.Items.Count)
RadioButtonList2.Items[i].Selected = false;
i++;
}
if (RadioButtonList2.Items[0].Selected == true || RadioButtonList2.Items[1].Selected == true)
{
while(i >= RadioButtonList1.Items.Count)
RadioButtonList1.Items[i].Selected = false;
i++;
}
Try the above code. The logic is there, just explore it.
Please mark this as correct if it fixed your problem.
Best regards,
Eduard