With three-tier architecture development, using the abstract factory, which with a database attached to

MySchool
........\DB
........\..\MySchool.mdb
........\..\MySchool.mdf
........\..\MySchool_log.ldf
........\MySchool
........\........\App.config
........\........\bin
........\........\...\Debug
........\........\...\.....\MySchool.exe
........\........\...\.....\MySchool.exe.config
........\........\...\.....\MySchool.mdb
........\........\...\.....\MySchool.pdb
........\........\...\.....\MySchool.vshost.exe
........\........\...\.....\MySchool.vshost.exe.config
........\........\...\.....\MySchoolBLL.dll
........\........\...\.....\MySchoolBLL.pdb
........\........\...\.....\MySchoolDAL.dll
........\........\...\.....\MySchoolDAL.pdb
........\........\...\.....\MySchoolDALFactory.dll
........\........\...\.....\MySchoolDALFactory.pdb
........\........\...\.....\MySchoolIDAL.dll
........\........\...\.....\MySchoolIDAL.pdb
........\........\...\.....\MySchoolModals.dll
........\........\...\.....\MySchoolModals.pdb
........\........\MySchool.csproj
........\........\obj
........\........\...\Debug
........\........\...\.....\MySchool.csproj.GenerateResource.Cache
........\........\...\.....\MySchool.exe
........\........\...\.....\MySchool.pdb
........\........\...\.....\MySchool.Properties.Resources.resources
........\........\...\.....\MySchool.StudentList.resources
........\........\...\.....\Refactor
........\........\...\.....\ResolveAssemblyReference.cache
........\........\...\.....\TempPE
........\........\...\MySchool.csproj.FileList.txt
........\........\Program.cs
........\........\Properties
........\........\..........\AssemblyInfo.cs
........\........\..........\Resources.Designer.cs
........\........\..........\Resources.resx
........\........\..........\Settings.Designer.cs
........\........\..........\Settings.settings
........\........\StudentList.cs
........\........\StudentList.Designer.cs
........\........\StudentList.resx
........\MySchool.sln
........\MySchoolBLL
........\...........\bin
........\...........\...\Debug
........\...........\...\.....\MySchoolBLL.dll
........\...........\...\.....\MySchoolBLL.pdb
........\...........\...\.....\MySchoolDAL.dll
........\...........\...\.....\MySchoolDAL.pdb
........\...........\...\.....\MySchoolDALFactory.dll
........\...........\...\.....\MySchoolDALFactory.pdb
........\...........\...\.....\MySchoolIDAL.dll
........\...........\...\.....\MySchoolIDAL.pdb
........\...........\...\.....\MySchoolModals.dll
........\...........\...\.....\MySchoolModals.pdb
........\...........\MySchoolBLL.csproj
........\...........\obj
........\...........\...\Debug
........\...........\...\.....\MySchoolBLL.dll
........\...........\...\.....\MySchoolBLL.pdb
........\...........\...\.....\Refactor
........\...........\...\.....\........\MySchoolBLL.dll
........\...........\...\.....\ResolveAssemblyReference.cache
........\...........\...\.....\TempPE
........\...........\...\MySchoolBLL.csproj.FileList.txt
........\...........\Properties
........\...........\..........\AssemblyInfo.cs
........\...........\StudentManager.cs
........\MySchoolDAL
........\...........\Access
........\...........\......\DBHelper.cs
........\...........\......\StudentService.cs
........\...........\bin
........\...........\...\Debug
........\...........\...\.....\MySchoolDAL.dll
........\...........\...\.....\MySchoolDAL.pdb
........\...........\...\.....\MySchoolIDAL.dll
........\...........\...\.....\MySchoolIDAL.pdb
........\...........\...\.....\MySchoolModals.dll
........\...........\...\.....\MySchoolModals.pdb
........\...........\MySchoolDAL.csproj
........\...........\obj
........\...........\...\Debug
........\...........\...\.....\MySchoolDAL.dll
........\...........\...\.....\MySchoolDAL.pdb
........\...........\...\.....\Refactor
........\...........\...\.....\........\MySchoolDAL.dll
........\...........\...\.....\ResolveAssemblyReference.cache
........\...........\...\.....\TempPE
........\...........\...\MySchoolDAL.csproj.FileList.txt
........\...........\Properties
........\...........\..........\AssemblyInfo.cs
........\...........\SQL
........\...........\...\DBHelper.

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