MetadataType missing assembly reference [closed]

Question

  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Web;
  using System.ComponentModel.DataAnnotations;




  namespace yplaylist.Models
  {
     [MatadataType(typeof(Song_Validation))]
     public partial class Song
     {

     }

     public class Song_Validation
     {



     }
 }

MetadataType is highlighted saying that it could not be found missing a using directive or assembly reference? what am I missing?

Answer 1

You are missing assembly System.ComponentModel.DataAnnotations.dll in reference