$ Metadata with OAP attribute attribute for WebAPi does not work

I am using OData Attribute Routing for OData endpoint. Here's an example of what I have:

[ODataRoutePrefix("Profile")]
public class ProfileODataController : ODataController
{
    [ODataRoute]
    [EnableQuery]
    public IHttpActionResult Get()
    {
        var repo = new Repositories.ProfileRepository();

        return Ok(repo.GetProfiles());
    }

    [ODataRoute("({key})")]
    [EnableQuery]
    public IHttpActionResult Get([FromODataUri] string key)
    {
        var repo = new Repositories.ProfileRepository();

        var result = repo.GetProfiles().SingleOrDefault(x => x.Id== key);
        if (result == null) return NotFound();

        return Ok(result);
    }
}

      

        
        
        
      

    

Here's my setup:

config.MapODataServiceRoute("odata", "odata", ModelGenerator.GetEdmModel());

      

        
        
        
      

    

Here is my generation of EdmModel:

public static IEdmModel GenerateEdmModel()
{
    var builder = new ODataConventionModelBuilder();

    builder.EntitySet<Profile>("Profile").EntityType.HasKey(x => x.Id);

    return builder.GetEdmModel();
}

      

        
        
        
      

    

The urls /odata/Profile

and /odata/Profile('someid')

work, but when I try to access the $ metadata ( /odata/$metadata#Profile

) endpoint , I get the following error:

{"Message": "No HTTP resource found that matches the request URI" http: // **** / odata / $ metadata ".," MessageDetail ":" No type was found that matches a controller named "Metadata ". "}

Do I need to create a controller / action to serve the metadata? If so, how is this action implemented?