Hotel management system can use C# to write full-featured 3-tier structure

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....\DB
....\..\HotelManager.mdf
....\..\HotelManager_log.ldf
....\..\说明.txt
....\HotelTest
....\.........\Backup
....\.........\......\Hotel
....\.........\......\.....\App.config
....\.........\......\.....\Hotel.csproj
....\.........\......\.....\MainForm.cs
....\.........\......\.....\MainForm.Designer.cs
....\.........\......\.....\MainForm.resx
....\.........\......\.....\Program.cs
....\.........\......\.....\Properties
....\.........\......\.....\..........\AssemblyInfo.cs
....\.........\......\.....\..........\DataSources
....\.........\......\.....\..........\...........\HotelModels.RoomInfo.datasource
....\.........\......\.....\..........\Resources.Designer.cs
....\.........\......\.....\..........\Resources.resx
....\.........\......\.....\..........\Settings.Designer.cs
....\.........\......\.....\..........\Settings.settings
....\.........\......\.....\resource

....\.........\......\.....\........\上记录.bmp
....\.........\......\.....\........\下记录.bmp
....\.........\......\.....\........\保存.bmp
....\.........\......\.....\........\修改.bmp
....\.........\......\.....\........\删除.bmp
....\.........\......\.....\........\取消.bmp
....\.........\......\.....\........\尾记录.bmp
....\.........\......\.....\........\搜索.bmp
....\.........\......\.....\........\新增.bmp
....\.........\......\.....\........\查询选择.bmp
....\.........\......\.....\........\计算.bmp
....\.........\......\.....\........\退出.BMP
....\.........\......\.....\........\首记录.bmp
....\.........\......\.....\RoomInfoForm.cs
....\.........\......\.....\RoomInfoForm.Designer.cs
....\.........\......\.....\RoomInfoForm.resx
....\.........\......\.....\RoomTypeForm.cs
....\.........\......\.....\RoomTypeForm.Designer.cs
....\.........\......\.....\RoomTypeForm.resx
....\.........\......\HotelDAL
....\.........\......\........\HotelDAL.csproj
....\.........\......\........\Properties
....\.........\......\........\..........\AssemblyInfo.cs
....\.........\......\........\RoomService.cs
....\.........\......\........\RoomTypeService.cs
....\.........\......\HotelManager
....\.........\......\............\HotelBLL.csproj
....\.........\......\............\Properties
....\.........\......\............\..........\AssemblyInfo.cs
....\.........\......\............\RegularNumber.cs
....\.........\......\............\RoomInfoManager.cs
....\.........\......\............\RoomTypeManager.cs
....\.........\......\HotelModels
....\.........\......\...........\HotelModels.csproj
....\.........\......\...........\Properties
....\.........\......\...........\..........\AssemblyInfo.cs
....\.........\......\...........\RoomInfo.cs
....\.........\......\...........\RoomType.cs
....\.........\......\HotelTest.sln
....\.........\Hotel
....\.........\.....\App.config
....\.........\.....\bin
....\.........\.....\...\Debug
....\.........\.....\...\.....\Hotel.exe
....\.........\.....\...\.....\Hotel.exe.config
....\.........\.....\...\.....\Hotel.pdb
....\.........\.....\...\.....\Hotel.vshost.exe
....\.........\.....\...\.....\Hotel.vshost.exe.config
....\.........\.....\...\.....\Hotel.vshost.exe.manifest
....\.........\.....\...\.....\HotelDAL.dll
....\.........\.....\...\.....\HotelDAL.pdb
....\.........\.....\...\.....\HotelManager.dll
....\.........\.....\...\.....\HotelManager.pdb
....\.........\.....\...\.....\HotelModels.dll
....\.........\.....\...\.....\HotelModels.pdb
....\.........\.....\Hotel.csproj
....\.........\.....\MainForm.cs
....\.........\.....\MainForm.Designer.cs
....\.........\.....\MainForm.resx
....\.........\.....\obj
....\.........\.....\...\Debug
....\.........\.....\...\.....\Hotel.csproj.FileListAbsolute.txt
....\.........\.....\...\.....\Hotel.csproj.GenerateResource.Cache
....\.........\.....\...\.....\Hotel.exe
....\.........\.....\...\.....\Hotel.MainForm.resources
....\.........\.....\...\.....\Hotel.pdb
....\.........\.....\...\.....\Hotel.Properties.Resources.resources
....\.........\.....\...\.....\Hotel.RoomInfoForm.resources
....\.........\.....\...\.....\Hotel.RoomTypeForm.resources
....\.........\....

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