Override repositories in EpiServer

InitializaCustomRepository.cs

using EPiServer.Framework;
using EPiServer.Framework.Initialization;
using EPiServer.ServiceLocation;

namespace Business.Initialization
{
    [InitializableModule]
    [ModuleDependency(typeof(ServiceContainerInitialization))]
    public class InitializaCustomRepository : IConfigurableModule
    {
        public void Initialize(InitializationEngine context)
        {

        }

        public void Uninitialize(InitializationEngine context)
        {

        }

        public void Preload(string[] parameters)
        {

        }

        public void ConfigureContainer(ServiceConfigurationContext context)
        {
            context.Container.Configure(x => x.For<EPiServer.Web.Routing.UrlResolver>().Use<Business.MyUrlResolver>());
        }
    }
}

MyUrlResolver.cs

namespace Business
{
    // Same Lifecycle as UrlResolver
    [ServiceConfiguration(ServiceType = typeof(EPiServer.Web.Routing.UrlResolver), Lifecycle = ServiceInstanceScope.Singleton)]
    public class MyUrlResolver : EPiServer.Web.Routing.UrlResolver
    {
        // Override all the base
    }
}