I would recommend to use a custom class where you define all metadata and formats you would like to retrieve.

public class MyMedia : MediaItem {
  [Metadata("Title")]
  public string Title { get; set; }
  [ResizeEffect(150,150,ResizeMode.ScaleToFill)]
  public Thumbnail Thumbnail { get; set; }
}

Then I would use this class to retrieve the media based on the selected data in the MediaReferenceList.

var client = ClientFactory.GetSdkClient();
var mediaList = client.Load<MyMedia>(mediaReferenceList.Select(m => m.Id)).ToList();

You can see more examples at

http://imagevault.se/en/documentation/api-documentation/?page=csharp/examples/querying-mediaitems/metadata/retrieving.html

http://imagevault.se/en/documentation/api-documentation/?page=csharp/examples/querying-mediaitems/formats/webmediaformat.html

http://imagevault.se/en/documentation/api-documentation/?page=episerverplugin/propertymedialist.html

/Dan

For further questions about ImageVault you can access the ImageVault forum here at episerver world

http://world.episerver.com/Modules/Forum/Pages/Forum.aspx?id=73302&epslanguage=en

You'll get better attention there.

/Dan

When i try to implement the class i get this error message

"cannot access protected constructor 'MetaData' here"

any ideas?

You have to use the following using statements

using ImageVault.Client;
using ImageVault.Client.Descriptors;
using ImageVault.Client.Descriptors.Effects;
using ImageVault.Common.Data;