Loosely-Coupled Class Which uses APIs from UmbracoHelper

ResourceService.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using MyProject.Models;
using Umbraco.Web;
using Our.Umbraco.Ditto;

namespace MyProject.Services
{
    public class ResourceService : IResourceService
    {
        private ITypedPublishedContentQuery publishedContentQuery;

        public ResourceService(ITypedPublishedContentQuery publishedContentQuery)
        {
            this.publishedContentQuery = publishedContentQuery;
        }
        public IEnumerable<Resource> GetResources()
        {
            return publishedContentQuery.TypedContentAtXPath("//item").As<Resource>();
        }
    }
}