/// <summary>
/// 把结果集流转换成数据实体序列（延迟）
/// </summary>
/// <typeparam name="T">数据实体类型</typeparam>
/// <param name="reader">结果集流</param>
/// <returns>数据实体序列（延迟）</returns>
public static IEnumerable <T> DataReaderToListLazy <T>(this IDataReader reader)
where T : class, new()
{
if (reader == null)
{
throw new ArgumentNullException("reader");
}
return(EntityConverter <T> .DataReaderToListDelay(reader));
}