/// <summary>
/// 返回指定类型的集合
/// </summary>
/// <param name="where">条件</param>
/// <param name="order">排序</param>
/// <param name="isAsc">是否升序</param>
/// <param name="selector">返回指定对象</param>
/// <returns></returns>
public IList <S> GetEntities <S, K>(Expression <Func <T, bool> > where = null, Expression <Func <T, K> > order = null,
bool isAsc = true, Expression <Func <T, S> > selector = null)
{
return(_baseDal.GetEntities(where, order, isAsc, selector));
}