public class ProductRepository : TestBase<Product>
    {
        #region Constructors
        public ProductRepository() { }

        public ProductRepository(IUnitOfWork db) : base((TestDataContext)db) { }
        #endregion

        /// <summary>
        /// 一個(ge)(ge)方法，也要建立這個(ge)(ge)repository，有點壞味(wei)道
        /// </summary>
        /// <param name="entity"></param>
        public override void Insert(Product entity)
        {
            base.Insert(entity);
        }
    }

public abstract class BLLBase
    {
        protected IUnitOfWork IUnitOfWork { get; private set; }
        public BLLBase()
            : this(null)
        {

        }
        public BLLBase(IUnitOfWork iUnitOfWork)
        {
            IUnitOfWork = iUnitOfWork;
        }
        protected ICompleteRepository<T> LoadRepository<T>() where T : class
        {
            return IUnitOfWork == null ? new TestBase<T>() : new TestBase<T>(IUnitOfWork);
        }
    }

         #region BLLBase中直接調用公用方法
            IUnitOfWork.IsNotSubmit = true;
            new OrderRepository(IUnitOfWork).Insert(order);
            if (product != null)
                LoadRepository<Product>().Insert(product);
            IUnitOfWork.SaveChanges();
          #endregion