I read some articles about issues with ASP.NET ScriptManager and ToolkitScriptManager but I dont find the solution for my problem.
I have a webapplication with AJAX updatepanel which is working fine. Now I want add controls from AJAX Toolkit. If I insert ToolkitScriptManager then I got an error only one instance of scriptmanager allowed.
As I read I can solve the issue with the scriptmanaerproxy control. But how? I have added more than one contentpages to ContentPlaceHolder control in masterpage.
Sourcecode of masterpage
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Masterpage.Master.cs" Inherits="Test18_Updatepanel_AJAX.MAsterpage" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runa ...
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