Generic Interface Problem

IRepository.cs

using System;
using System.Collections.Generic;

using TeaLeague.Core.Domain;

namespace TeaLeague.Core.Repository
{
    //What's the best way to approach this, seen as StructureMap seems to have problems with open generics....


    //This?
    public interface IRepository
    {
        IEnumerable<T> List<T>() where T : IEntity;

        T Get<T>(Guid id) where T : IEntity;

        void CreateOrUpdate<T>(T user) where T : IEntity;

        void Delete<T>(Guid id) where T : IEntity;
    }

    //Or this?
    public interface IRepository<T>
    {
        IEnumerable<T> List();

        T Get(Guid id);

        void CreateOrUpdate(T entity);

        void Delete(Guid id);
    }
}

//Might have to do something like this....http://lostechies.com/jimmybogard/2009/12/18/advanced-structuremap-connecting-implementations-to-open-generic-types/