Use Microsoft Unity Dependency Injection with ServiceStack

AppHost.cs

//Update the Configure method of the AppHost to resemble the following.
public sealed class AppHost : AppHostBase
{
    public AppHost()
        : base("ServiceStack", typeof(ExampleService).Assembly)
    {
    }

    public override void Configure(Container container)
    {
        //register any dependencies your services use, e.g:
        //container.Register<ICacheClient>(new MemoryCacheClient());
        
        //Create the IUnityContainer
        IUnityContainer unityContainer = new UnityContainer();

        //register your objects
        unityContainer.RegisterType<IExampleRepository, ExampleRepository>();
        

        //Create the Adapter
        var unityAdapter = new UnityContainerAdapter(unityContainer);

        //Add the new adapter to ServiceStack
        container.Adapter = unityAdapter;
    }
}

/// <summary>
/// IContainerAdapter for the unity framework.
/// </summary>
public class UnityContainerAdapter : IContainerAdapter
{
    private readonly IUnityContainer _unityContainer;

    public UnityContainerAdapter(IUnityContainer container)
    {
        _unityContainer = container;
    }

    public T Resolve<T>()
    {
        return _unityContainer.Resolve<T>();
    }

    public T TryResolve<T>()
    {
        if (_unityContainer.IsRegistered(typeof(T)))
        {
            return (T)_unityContainer.Resolve(typeof(T));
        }

        return default(T);
    }
}