Commented Unassigned: Problems with Upgrade ASP.NET AJAX Control Toolkit v15.1 - The type or namespace name 'ScriptManager' does not exist in the namespace 'AjaxControlToolkit' (are you missing an assembly reference?) [27978]

Hi,

I use this points to upgrade ASP.NET AJAX Control Toolkit v15.1

https://ajaxcontroltoolkit.codeplex.com/wikipage?title=Upgrade%20your%20project%20to%20AjaxControlToolkit%20v15.1

But, I have an error in the item 2:
2 - Replace ToolkitScriptManager with ScriptManagerThe ToolkitScriptManager has been deprecated for the v15.1 release. Please use the standard ScriptManager control. It should be sufficient to change the tag name in the markup from ToolkitScriptManager -> ScriptManager. If you find any issues, then please report them here.Refer to the "ToolkitScriptManager Removed in v15.1, Use ScriptManager" article for details.

This is the error (please view the attachment too)

Error 5 The type or namespace name 'ScriptManager' does not exist in the namespace 'AjaxControlToolkit' (are you missing an assembly reference?) C:\Rio2010_desa\zzz5.aspx.designer.cs 31 46 contiWebAJAX
Comments: Simple removing the __Toolkit__ prefix will not work. ScriptManager is not a part of AjaxControlToolkit, this is a standard ASP.NET control contained in the System.Web.UI namespace and should have the __asp:__ tag prefix:: ``` <asp:ScriptManager ID="ScriptManager1" runat="server" /> ```