title: AjaxControlToolkit.ToolkitScriptManager is not available in version 16.1.1.0
body: <p>I was facing a problem with backspace button while using MaskedEditExtender, that's why I upgraded the AjaxControlToolkit from v 4.1.60919.0 to the latest version n 16.1.1.0. But now I am facing a new error, we were implementing the toolkitscriptmanager but now I cannot find it, even in the solution there is no ToolkitScriptManager neither ScriptManager to be called. So what should I do?
  To understand what I mean:</p>
  
  <p>In web.config I am assembling the AjaxControlToolkit to cc1</p>
  
  <pre><code>&lt;add tagPrefix="cc1" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit"/&gt;
  </code></pre>
  
  <p>Whenever I use cc1 tag in my .aspx pages, element ToolkitScriptManager is not valid in the new version. How can I fix the problem?</p>