title: Rider on Mac gives me cannot resolve symbol on linq methods like Any and Skip, whyP
body: <p>Rider on Mac. Old asp.net project.</p>
  
  <p>I am in the process of building the solution for the first time, but getting different errors.</p>
  
  <p>I am getting this cannot resolve symbol on Any() and Skip() and different linq methods. </p>
  
  <p>How can I resolve this?</p>