title: Using html in ErrorMessage property of data annotations
body: <p>Anyone know if it is possible to do the following:</p>
  
  <pre><code>public class User
  {
      public Guid UserID { get; set; }
  
      [Required(ErrorMessage="A school selection is required.")]
      [Range(1, int.MaxValue, ErrorMessage="School not found.  Please contact support at &lt;a href='mailto:support@mysite.com'&gt;support@mysite.com&lt;/a&gt;")]
      public int SchoolID { get; set; }
  
      // ... other properties
  }
  </code></pre>
  
  <p>And not have <code>@Html.ValidationMessageFor(model =&gt; model.SchoolID)</code> encode the HTML?  Maybe I need to make a custom helper extension for this?  Is there an easier way?  Any guidance would be appreciated.  If a helper extension is the way to go, how could I access the validation rules in the helper extension method to make sure the html doesn't get encoded?</p>
  
  <p>Thanks.</p>