User Control And Master Page ASP.Net

<%@ page language="C#" MasterPageFile="~/Default.master" %>
             contentplaceholderid="ContentPlaceHolder1" 
             runat="server">
             this is a test

File: Default.master
<%@ master language="C#" %>


    Untitled Page


    
        
            
                
                    

My Little Company


                
            

            
                
                
            
        
Navigation?