在asp.net中同时选中了三个单选按钮

<asp:CheckBox ID="CheckBox1" runat="server" Text="选项1" />
<asp:CheckBox ID="CheckBox2" runat="server" Text="选项2" />
<asp:CheckBox ID="CheckBox3" runat="server" Text="选项3" />
<asp:Button ID="Button1" runat="server" Text="提交" OnClick="Button1_Click" />

protected void Button1_Click(object sender, EventArgs e)
{
    if (CheckBox1.Checked)
    {
        // 选项1被选中
    }
    if (CheckBox2.Checked)
    {
        // 选项2被选中
    }
    if (CheckBox3.Checked)
    {
        // 选项3被选中
    }
}