title: Asp.NET Ajax Application (.NET framework 4.0) upgrade option
body: <p>I have an ASP.net Ajax application that was written years ago. It is in .NET version 4.0 in VS 2010. I would like to upgrade it to .NET version 4.6 using VS 2017. Would you know if this would cause problem in .NET version 4.6 or VS 2017 ?  Is there a new version of AjaxControlToolKit for .NET version 4.6 ?</p>
  <p>Obviously I am doing this in a safer approach, since this application impacts quite big.</p>
  <p>Highly appreciated your response!</p>
  <p>Have a great day!</p>