title: System.Web.Http missing in .net Core 2.1
body: <p>System.Web.Http is missing in my .net core 2.1 project.</p>
  
  <p>the error states</p>
  
  <blockquote>
    <p>Error CS0234  The type or namespace name 'Http' does not exist in the namespace 'System.Web' (are you missing an assembly reference?)</p>
  </blockquote>
  
  <p>please refer the image for more clarity</p>
  
  <p><a href="https://i.stack.imgur.com/HftJ3.png" rel="noreferrer"><img src="https://i.stack.imgur.com/HftJ3.png" alt="Reference"></a></p>