Quote:Hi All, I have a website on asp.net4.0. I wish to use Ajax Control ToolKit but it is giving compilation error Quote:Error 20 The type 'System.Web.UI.ExtenderControl' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' I did following to install AjaxControl Toolkit 1) Installed NuGet 2) Installed AjaxControlToolKit using NuGet Console in Visual Studio 2010 Install-Package AjaxControlToolKit Error comes as soon as i add Quote:<ajaxToolkit:ToolkitScriptManager runat="server" ID="ScriptManager1" /> Please help.
Quote:Error 20 The type 'System.Web.UI.ExtenderControl' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'
Quote:<ajaxToolkit:ToolkitScriptManager runat="server" ID="ScriptManager1" />
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