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I have added AjaxControlToolkit for .NET 4 into my web form project through Nuget. But I cannot add the controls into my Toolbox in Visual Studio. The steps of adding the controls I used are exactly same with the answer of this post, but after I selected the .dll file and click "Open", this error keep coming up:

There are no components in 'My Project Location\packages\AjaxControlToolkit.7.0725\lib\40\AjaxControlToolkit.dll' that can be placed on the toolbox.

My project is using .NET 4 also, I have checked it. I have done some research but there is no solution for this problem online! I also tried to add the toolkit from the zip file downloaded from the official website, same error! I don't know whether it is a Visual Studio problem. Please help me! This troublesome mystery has puzzled me for many days...

Thanks in advance!

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Litash
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  • did you find the answer? i want the controls in my toolbox too. – bendecko Sep 12 '13 at 09:50
  • No I didn't...I moved on to use jQuery for ajax calls. It seems this problem is weird and rarely happened. I think it is not the toolkit's problem, it should be a bug from VS. – Litash Sep 13 '13 at 10:49

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try this new Ajaxtoolkit....... http://ajaxcontroltoolkit.codeplex.com/releases/view/109918

Abhishek Patel
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