摘要： usingSystem;usingSystem.Collections.Generic;usingSystem.Linq;usingSystem.Text;usingCRM.Model;usingSystem.Configuration;usingSystem.Linq.Expressions;usingSystem.Data.SqlClient;usingSystem.Data.Linq;namespaceCRM.DAL{///<summary>///Linq数据访问层///</summary>publicclassLinqHelper{///<summary& 阅读全文