/// <summary>
/// 从数据库中批量刷新记录，放弃更改
/// </summary>
/// <param name="entities">要刷新的对象集合</param>
public void Refresh(IEnumerable <TEntity> entities)
{
PublicHelper.CheckArgument(entities, "entities");
EFContext.Refresh <TEntity, TKey>(entities);
}
/// <summary>
/// 从数据库中刷新一条记录，放弃更改
/// </summary>
/// <param name="entity">要刷新的对象</param>
public void Refresh(TEntity entity)
{
PublicHelper.CheckArgument(entity, "entity");
EFContext.Refresh <TEntity, TKey>(entity);
}