title: System.Web.UI.ScriptManager' does not have a public property named 'Button'
body: <p>i try to show ssrsc reports in asp.net web page and for this i search tutorials and i find tutorials which shows me add script manager ,reportviewer and a button when i add these 3 things in my project in .aspx page and then when i debug my project then it shows me error 
  and here i clear that i can not add ajax tool kit reigster assembly in .aspx page for this how i add register assebly for ajax
  code</p>
  
  <pre><code>&lt;%@ Register assembly="Microsoft.ReportViewer.WebForms, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" namespace="Microsoft.Reporting.WebForms" tagprefix="rsweb" %&gt;
  &lt;asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="server"&gt;
      &lt;div align ="center" class="adminform"&gt;       
  &lt;br /&gt;&lt;br /&gt;        
          &lt;center&gt;
          &lt;div class="vpb_main_wrapper"  align="center" style="left: inherit"/&gt;&lt;br clear="all"/&gt;
              &lt;asp:ScriptManager ID="ScriptManager1" runat="server"&gt;
  
            &lt;asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" /&gt;
  
              &lt;rsweb:ReportViewer ID="ReportViewer2" runat="server" Height="261px" 
                  Width="476px"&gt;
              &lt;/rsweb:ReportViewer&gt;
                 &lt;/asp:ScriptManager&gt; 
      &lt;/center&gt;
      &lt;/div&gt;
  
  &lt;/asp:Content&gt;
  </code></pre>
  
  <p>Error</p>
  
  <pre><code>Type 'System.Web.UI.ScriptManager' does not have a public property named 'Button'.
  
  Source Error:
  
  
  Line 11:             &lt;asp:ScriptManager ID="ScriptManager1" runat="server"&gt;
  Line 12:             
  Line 13:           &lt;asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" /&gt;
  Line 14: 
  Line 15:             &lt;rsweb:ReportViewer ID="ReportViewer2" runat="server" Height="261px" 
  </code></pre>