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Reference required to assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' containing the base class 'System.Web.UI.ScriptManager'. Add one to your project

Hello all,

Recently, I had created an .aspx page and added the ASP.NET Ajax Tab control from the Ajax Control Toolkit. But since I had forgotten to update the web.config of th eweb site project, I had the following error messages when I display the ajax enabled web page on the browser.

Reference required to assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' containing the base class 'System.Web.UI.ScriptManager'. Add one to your project.

So in order to resolve this problem, I opened the web.config configuration file and paste the following code between the assemblies tags in the compilation tags of the aspx configuration file.

<add assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

And of course I had to go one more step and handle the httpHandlers section as described in the post 'Sys' is undefined. and 'Type' is undefined. Javascript error messages with ASP.NET AjaxControlToolkit

Published Monday, June 09, 2008 3:31 PM
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SQL Server administrator and T-SQL developer including BI components Web programming with HTML, HTML5 and ASP, ASP.NET and .NET Framework developer SAP ABAP and SAPUI5 development, Web Dynpro and Smart Form Siemens HiPath Center CTI development
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