mtsknn

var contentRepo = ServiceLocator.Current.GetInstance<IContentRepository>();
var contentTypeRepo = ServiceLocator.Current.GetInstance<IContentTypeRepository>();
var contentType = contentTypeRepo.Load(typeof (PageData));

var usageRepo =
    ServiceLocator.Current.GetInstance<IContentModelUsage>()
        .ListContentOfContentType(contentType)
        .Select(x => x.ContentLink.ToReferenceWithoutVersion()).Distinct()
        .ToList();