MVC 创建线程内的db单例

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using LSUnion.Site.Models;

 namespace LSUnion.Site.WebHelper
 {
     using System.Runtime.Remoting.Messaging;
     public class Factory
     {
         public static LSUnionEntities GetDbContext()
         {
             object db = CallContext.GetData("LSUnionEntities");
             if (db==null)
             {
                 db = new LSUnionEntities();
                 CallContext.SetData("LSUnionEntities",db);
             }
             return db as LSUnionEntities;
         }
     }
 }