Hi,

I am using Umbraco 6.1 with an UmbracoApiController which has a IUnitOfWork injected into it's constructor. To inject the dependencies, I am using Unity, like I have in the past with standard Web API projects. Normally, I set unity up in the Global.asax.cs. As Umbraco does not have this I have created my own UmbracoEvents handler, which inherits from IApplicationEventHandler, and has the methods:

• OnApplicationInitialized
• OnApplicationStarting
• OnApplicationStarted
• ConfigureApi

        public void OnApplicationStarted(UmbracoApplicationBase umbracoApplication, ApplicationContext applicationContext)
        {
            _applicationContext = applicationContext;
            _umbracoApplication = umbracoApplication;
            _contentService = ApplicationContext.Current.Services.ContentService;
            this.ConfigureApi(GlobalConfiguration.Configuration);
            Database.SetInitializer(null);
            PropertySearchContext db = new PropertySearchContext();
            db.Database.Initialize(true);
        }
        private void ConfigureApi(HttpConfiguration config)
        {
            var unity = new UnityContainer();
            unity.RegisterType<PropertiesApiController>();
            unity.RegisterType<IUnitOfWork, UnitOfWork>(new HierarchicalLifetimeManager());
            config.DependencyResolver = new IoCContainer(unity);
        }

 public class PropertiesApiController : UmbracoApiController
    {
        private readonly IUnitOfWork _unitOfWork;
        public PropertiesApiController(IUnitOfWork unitOfWork)
        {
            if(null == unitOfWork)
                throw new ArgumentNullException();
            _unitOfWork = unitOfWork;
        }
        public IEnumerable GetAllProperties()
        {
            return new[] {"Table", "Chair", "Desk", "Computer", "Beer fridge"};
        }
    }