c# - asp:Content still visible when using Visible="False" -


i have master page couple contentplaceholder inside , added content page of master page.

i set visible="false" on 1 asp:content in page it's not working i'm still able view data of both asp:content controls.

why?

master page:

<%@ master language="c#" autoeventwireup="true" codebehind="masterbase.master.cs" inherits="masterbase" %> <!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">          <html xmlns="http://www.w3.org/1999/xhtml" >         <head runat="server">                    </head>                 <body>             <form id="form1" runat="server">                 <!-- header -->                 <asp:contentplaceholder id="head" runat="server" />                  <!-- content -->                 <asp:contentplaceholder id="bodycontent" runat="server" />                  <!-- footer -->                 ...             </form>         </body> </html>

content page

<asp:content id="content1" contentplaceholderid="head" runat="server" visible="false">       <!-- data --> </asp:content>   <asp:content id="content2" contentplaceholderid="bodycontent" runat="server">      <!-- data -->   </asp:content>

try 

 mpcontentplaceholder = (contentplaceholder)master.findcontrol("content1");   mpcontentplaceholder.visible=false;

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