title: How to simulate SessionStateBehavior.ReadOnly in .net core
body: <p>i need to make parallel request in .net core. </p>
  
  <p>In MVC is easy to do that with </p>
  
  <pre><code>SessionStateBehavior.ReadOnly
  </code></pre>
  
  <p>but i suppose we can not use in .net core app so How to simulate <code>System.Web.SessionState.SessionStateBehavior.ReadOnly</code> in .net core</p>