title: How to use System.Web.UI.UserControl in .net core
body: <p>I'm migrating MVC application to ASP.NET CORE.
  In that I'm using web user control.</p>
  <p><code>UserControl ctrl= oLogSite as UserControl;</code>
  Here <strong>oLogSite</strong> is object type.</p>
  <p>Please let me know how to use in .Core</p>