获取asp.net上RadiobuttonList的ID列表

<asp:RadioButtonList ID="myRadioButtonList" runat="server">
    <asp:ListItem Text="Option 1" Value="1"></asp:ListItem>
    <asp:ListItem Text="Option 2" Value="2"></asp:ListItem>
    <asp:ListItem Text="Option 3" Value="3"></asp:ListItem>
</asp:RadioButtonList>

RadioButtonList radioButtonList = (RadioButtonList)FindControl("myRadioButtonList");
List<string> idList = new List<string>();

foreach (ListItem item in radioButtonList.Items)
{
    idList.Add(item.ID);
}