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Use RadioButton to set font size

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs"  Inherits="Default_aspx" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">     <title>RadioButton Control</title> </head> <body>     <form id="form1" runat="server">     <div>     <h1>RadioButton Control</h1>      <br />      <asp:Label ID="lblTime" runat="server" OnInit="lblTime_Init"></asp:Label>            <br />      <asp:RadioButton ID="rdoSize10" runat="server" GroupName="grpSize" AutoPostBack="True" Text="10pt" OnCheckedChanged="grpSize_CheckedChanged" />      <asp:RadioButton ID="rdoSize14" runat="server" GroupName="grpSize" AutoPostBack="True" Text="14pt" OnCheckedChanged="grpSize_CheckedChanged" />      <asp:RadioButton ID="rdoSize16" runat="server" GroupName="grpSize" AutoPostBack="True" Text="16pt" OnCheckedChanged="grpSize_CheckedChanged" />     </div>     </form> </body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class Default_aspx : System.Web.UI.Page  {    protected void grpSize_CheckedChanged(object sender, EventArgs e)    {      if (rdoSize10.Checked)        lblTime.Font.Size = 10;      else if (rdoSize14.Checked)        lblTime.Font.Size = 14;      else lblTime.Font.Size = 16;    }    protected void lblTime_Init(object sender, EventArgs e)    {      lblTime.Font.Name = "Verdana";      lblTime.Font.Size = 20;      lblTime.Font.Bold = true;      lblTime.Font.Italic = true;      lblTime.Text = DateTime.Now.ToString();    }  }