three-tier database c# code, tried, and very good use

C# 数据库三层架构源码20个
.........................\三层架构项目
.........................\............\DBTask
.........................\............\......\bin
.........................\............\......\...\Debug
.........................\............\......\...\.....\NET.AfritXia.MyHome.DBTask.dll
.........................\............\......\...\.....\NET.AfritXia.MyHome.DBTask.pdb
.........................\............\......\...\.....\NET.AfritXia.MyHome.Model.dll
.........................\............\......\...\.....\NET.AfritXia.MyHome.Model.pdb
.........................\............\......\DBTask.csproj
.........................\............\......\DBTask.csproj.user
.........................\............\......\DBTask.csproj.vspscc
.........................\............\......\DBTaskFactoryBuilder.cs
.........................\............\......\Definition
.........................\............\......\..........\IArticleTask.cs
.........................\............\......\..........\ICommentTask.cs
.........................\............\......\..........\IDBTask.cs
.........................\............\......\..........\IDBTaskFactory.cs
.........................\............\......\..........\IDBTaskTransaction.cs
.........................\............\......\..........\IHomeAdminTask.cs
.........................\............\......\..........\ILWordTask.cs
.........................\............\......\..........\OrderGist.cs
.........................\............\......\mssccprj.scc
.........................\............\......\obj
.........................\............\......\...\DBTask.csproj.FileList.txt
.........................\............\......\...\Debug
.........................\............\......\...\.....\DBTask.csproj.FileListAbsolute.txt
.........................\............\......\...\.....\NET.AfritXia.MyHome.DBTask.dll
.........................\............\......\...\.....\NET.AfritXia.MyHome.DBTask.pdb
.........................\............\......\...\.....\Refactor
.........................\............\......\...\.....\........\NET.AfritXia.MyHome.DBTask.dll
.........................\............\......\...\.....\ResolveAssemblyReference.cache
.........................\............\......\...\.....\TempPE
.........................\............\......\Properties
.........................\............\......\..........\AssemblyInfo.cs
.........................\............\DBTask.Access2000
.........................\............\.................\AccessTask.csproj.vspscc
.........................\............\.................\ArticleTask.cs
.........................\............\.................\ArticleTask.SQL.cs
.........................\............\.................\bin
.........................\............\.................\CommentTask.cs
.........................\............\.................\CommentTask.SQL.cs
.........................\............\.................\ConnectionFactory.cs
.........................\............\.................\CustomSQLHelper.cs
.........................\............\.................\DBTask.Access2000.csproj
.........................\............\.................\DBTask.Access2000.csproj.user
.........................\............\.................\DBTaskBase.cs
.........................\............\.................\DBTaskFactory.cs
.........................\............\.................\DBTaskTransaction.cs
.........................\............\.................\Events
.........................\............\.................\......\CommentEvent.cs
.........................\............\.................\HomeAdminTask.cs
.........................\............\.................\HomeAdminTask.SQL.cs
.........................\............\.................\LWordTask.cs
.........................\............\.................\LWordTask.SQL.cs
.........................\............\.................\mssccprj.scc
.........................\............\.................\MyOleDbParamCollection.cs
.........................\............\........

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