title: cannot find the SPSite name space
body: <p>I am unable to find the name space for the <code>SPSite</code></p>
  
  <p>I have imported these so far:</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  using System.Net;
  using Microsoft.SharePoint;
  using System.Collections;
  using Microsoft.SharePoint.Client;
  using Microsoft.SharePoint;
  using System.Data.SqlClient;
  using SP = Microsoft.SharePoint.Client;
  using System.Data;
  
  
  namespace GrandPermission
  {
      class Program
      {
          static void Main(string[] args)
          {
              SPSite oSPSite = new SPSite("http://spdevserver:1002/");
          }
      }
  }
  </code></pre>
  
  <p>And <code>SPSite</code> still has red line under it.
  <img src="https://i.stack.imgur.com/loBMi.png" alt="enter image description here">
  <img src="https://i.stack.imgur.com/pXweN.png" alt="enter image description here"></p>