extenderControlBase file missing from web application

I have recently upgraded from a website project to a web application project in visual studio.
I am using VS 2013.

Since then my confirm button extenders are not working as the project is requesting the ExtenderControlBase file and cannot find it.

I have reinstalled the AjaxToolKit using nuget(I am using the latest version), and it did not solve the problem.

I have also checked that the AjaxMin.dll is in the references folder/bin folder of my project.

I have also added in the Property of the solution, (debug source file tab) the file that the app is looking for (f:\TeamCity\buildAgent\work\80acd78aa4c25314\Server\AjaxControlToolkit\ExtenderBase\ExtenderControlBase.cs), but it did not make any difference.

I don't know what else to do.

Thank you for help in advance

Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Bob LearnedCommented:
1) How are you using the extenders?  

2) If you create another temporary web project, and try to use the extenders, do you have the same problem?
AnneSKSAuthor Commented:
I have recreated the web application already.

However I think I found the solution. I recreated again the web application and this time I did not install the ajaxcontrol toolkit.
When I needed the extender I pulled it from the toolbox.
It is working so far.

Now what is interesting is that the Ajax.min is not referenced in the project.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Bob LearnedCommented:
I am not sure what ajax.min is for?  AJAX minifier?
AnneSKSAuthor Commented:
I already explain in my comment my solution.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.