ASP.Net Calling Site.Master method from web page not working - asp.net

Question

I saw on several web pages how to interface to a public method defined in a master file from a web page call behind code that uses that master file.
(I am using ASP.Net 4.0 on Visual Studio 2012.)
The procedure is (copied from article):
Make sure the function is accessible to the page (i.e. declared
public), and use the MasterType declaration in the ContentPage:
<%# Page .... %>
<%# MasterType VirtualPath="~/masterpage.master" %>
In the page, use Page.Master.MyFunction() to access the function.
*Note: before being able to access the function, you'll need to save & build.
The problem is that I do not see the method. Here is what I have:
Web Page (stored in /MyFolder, so /MyFolder):
<%# Page Language="C#" AutoEventWireup="true" CodeBehind="Logout.aspx.cs" Inherits="BvCorpMain.Candidates.Logout" %>
<%# MasterType VirtualPath="/SiteMasters/Site.Master" %>
Site.Master CS file (stored in /SiteMasters folder):
public void UpdateUserBlocksToCookie()
{
}
When I go into the code behind for the logout page and in a method I type in "Page.Master.", I do not see my method.

Answer 1

Your page is inheriting from System.Web.UI.Page, which only knows that its master page is of type System.Web.UI.MasterPage. If you are making modifications to a child class of MasterPage, then you need to cast the Page.Master property to your child class.
public class MyPage : System.Web.UI.Page
{
public new MyMaster Master { get { return base.Master as MyMaster; } }
public void Page_Load(object sender, EventArgs e)
{
Master.MyMasterPageFunction();
}
}
public class MyMaster : System.Web.UI.MasterPage
{
public void MyMasterPageFunction()
{
}
}

Answer 2

The previous answer did educate me, however I believe the resolution was to restart VS2012, maybe cleaning the solution and rebuilding did not hurt. Either way.
Microsoft adds in the following code automatically to the .aspx.designer.cs file.
/// <summary>
/// Master property.
/// </summary>
/// <remarks>
/// Auto-generated property.
/// </remarks>
public new MyNamespace.Site Master {
get {
return ((BvCorpMain.Site)(base.Master));
}
The previous answer conflicts with this definition. Also, the previous answer of MyMaster, although granting access does not give (automatically at least) to needed form information. I checked. Using the existing master file is the cleanest.
The definition for the master.cs file is:
namespace MyNamespace
{
public partial class Site : System.Web.UI.MasterPage
As you can see, Microsoft did give access to MyNamespace.Site, which is what I needed, with "Master.".
I did not think to check the .aspx.designer.cs file for that definition, when I was having the problems. Possibly the definition was lacking and got added later, when either I rebuilt or did a save, which I had previously done, or whatever.
Knowing the addition does simplify things, as I can add that in manually if it does not exist using that construct.