title: DataTable.AsEnumerable() does not Exist on my Visual Studio For Mac System.Data
body: <p>I downloaded Visual Studio for Mac to give it a try.  I am working with data and linq.  When I try the following, AsEnumerable does not exist.  </p>
  
  <pre><code>using System.Linq;
  using System.Data;
  
  namespace TestingDataTable2
  {
      class Program
      {
          static void Main(string[] args)
          {
              DataTable dt = new DataTable();
              var query = from r in dt.AsEnumerable()
  
          }
      }
  }
  </code></pre>
  
  <p>Has anyone else ran into this problem with VS for Mac.  If I go into my References it is blank.  This seems like a fairly important feature to leave out, and I am wondering if this is the case, or if I did something wrong when downloading.  </p>
  
  <p>Edit: Error Message is - 'DataTable' does not contain a definition for 'AsEnumerable' and no accessible extension method 'AsEnumerable' accepting a first argument of type 'DataTable' could be found (are you missing a using directive or an assembly reference?)</p>