title: Response.Cache.SetCacheability not working
body: <p>While trying to cache a page using Response.Cache.SetCacheability(), I debug the program (F5)
  . However I'm unable to get this to work. Each time after clicking the button1, the Lable1 text is updated instantaneously. </p>
  
  <p>Code Behind file: </p>
  
  <pre><code>Response.Cache.SetCacheability(HttpCacheability.ServerAndNoCache);
  Response.Cache.SetExpires(DateTime.Now.AddSeconds(1000));
  Response.Cache.SetValidUntilExpires(true);
  label1.Text = " Using HTTP CachePolicy class" + DateTime.Now.ToString();
  </code></pre>
  
  <p>Here is my .ASPX page: </p>
  
  <pre><code>&lt;%@ Page Title="" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true" CodeFile="Default2.aspx.cs" Inherits="Default2" %&gt;
  &lt;asp:Content ID="Content1" ContentPlaceHolderID="HeadContent" Runat="Server"&gt;
  &lt;/asp:Content&gt;
  &lt;asp:Content ID="Content2" ContentPlaceHolderID="MainContent" Runat="Server"&gt;
  &lt;asp:Label runat="server" Text="Label" ID="label1"&gt;&lt;/asp:Label&gt;
      &lt;asp:Button ID="Button1" runat="server" Text="Button" /&gt;
  &lt;/asp:Content&gt;
  </code></pre>
  
  <p>Please help. I'm even unable to get this very basic example!</p>