Threetier structure ,，detailed in the program given in accordance with market requirements in the form of a threetier structure and development of code.

net三层结构
...........\cs架构MySchoolPro
...........\.................\MySchool.suo
...........\.................\MySchoolPro
...........\.................\...........\MySchoolPro.sln
...........\.................\...........\MySchoolPro.suo
...........\.................\...........\MySchoolModels
...........\.................\...........\..............\Admin.cs
...........\.................\...........\..............\MySchoolModels.csproj
...........\.................\...........\..............\Properties
...........\.................\...........\..............\..........\AssemblyInfo.cs
...........\.................\...........\..............\obj
...........\.................\...........\..............\...\BusinessEntity.csproj.FileList.txt
...........\.................\...........\..............\...\MySchoolModels.csproj.FileList.txt
...........\.................\...........\..............\...\MySchoolModels.csproj.FileListAbsolute.txt
...........\.................\...........\..............\...\Debug
...........\.................\...........\..............\...\.....\BusinessEntity.dll
...........\.................\...........\..............\...\.....\BusinessEntity.pdb
...........\.................\...........\..............\...\.....\MySchool.Models.dll
...........\.................\...........\..............\...\.....\MySchool.Models.pdb
...........\.................\...........\..............\...\.....\TempPE
...........\.................\...........\..............\...\.....\Refactor
...........\.................\...........\..............\...\.....\........\BusinessEntity.dll
...........\.................\...........\..............\...\.....\........\MySchool.Models.dll
...........\.................\...........\..............\bin
...........\.................\...........\..............\...\Debug
...........\.................\...........\..............\...\.....\BusinessEntity.dll
...........\.................\...........\..............\...\.....\BusinessEntity.pdb
...........\.................\...........\..............\...\.....\MySchool.Models.dll
...........\.................\...........\..............\...\.....\MySchool.Models.pdb
...........\.................\...........\MySchoolDAL
...........\.................\...........\...........\AdminService.cs
...........\.................\...........\...........\MySchoolDAL.csproj
...........\.................\...........\...........\Properties
...........\.................\...........\...........\..........\AssemblyInfo.cs
...........\.................\...........\...........\obj
...........\.................\...........\...........\...\DataController.csproj.FileList.txt
...........\.................\...........\...........\...\MySchoolDAL.csproj.FileList.txt
...........\.................\...........\...........\...\MySchoolDAL.csproj.FileListAbsolute.txt
...........\.................\...........\...........\...\Debug
...........\.................\...........\...........\...\.....\DataController.dll
...........\.................\...........\...........\...\.....\DataController.pdb
...........\.................\...........\...........\...\.....\MySchool.DAL.dll
...........\.................\...........\...........\...\.....\MySchool.DAL.pdb
...........\.................\...........\...........\...\.....\ResolveAssemblyReference.cache
...........\.................\...........\...........\...\.....\TempPE
...........\.................\...........\...........\...\.....\Refactor
...........\.................\...........\...........\...\.....\........\DataController.dll
...........\.................\...........\...........\...\.....\........\MySchool.DAL.dll
...........\.................\...........\...........\bin
...........\.................\...........\...........\...\Debug
...........\.................\...........\...........\...\.....\BusinessEntity.dll
...........\.................\...........\...........\...\.....\BusinessEntity.pdb
...........\.................\...........\...........\...\.....\DataController.dll
...........\.................\...........\......

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