File list (Check if you may need any files):
BookShop
........\BusinessEntity
........\..............\app.config
........\..............\bin
........\..............\...\Debug
........\..............\...\.....\BusinessEntity.dll
........\..............\...\.....\BusinessEntity.dll.config
........\..............\...\.....\BusinessEntity.pdb
........\..............\BookDS.Designer.cs
........\..............\BookDS.xsc
........\..............\BookDS.xsd
........\..............\BookDS.xss
........\..............\BusinessEntity.csproj
........\..............\CategoriesDS.Designer.cs
........\..............\CategoriesDS.xsc
........\..............\CategoriesDS.xsd
........\..............\CategoriesDS.xss
........\..............\CollegeDS.Designer.cs
........\..............\CollegeDS.xsc
........\..............\CollegeDS.xsd
........\..............\CollegeDS.xss
........\..............\DataSet1.Designer.cs
........\..............\DataSet1.xsc
........\..............\DataSet1.xsd
........\..............\DataSet1.xss
........\..............\MajorDS.Designer.cs
........\..............\MajorDS.xsc
........\..............\MajorDS.xsd
........\..............\MajorDS.xss
........\..............\obj
........\..............\...\BusinessEntity.csproj.FileList.txt
........\..............\...\BusinessEntity.csproj.FileListAbsolute.txt
........\..............\...\Debug
........\..............\...\.....\BusinessEntity.dll
........\..............\...\.....\BusinessEntity.pdb
........\..............\...\.....\Refactor
........\..............\...\.....\........\BusinessEntity.dll
........\..............\...\.....\TempPE
........\..............\...\.....\......\BookDS.Designer.cs.dll
........\..............\...\.....\......\CategoriesDS.Designer.cs.dll
........\..............\...\.....\......\CollegeDS.Designer.cs.dll
........\..............\...\.....\......\DataSet1.Designer.cs.dll
........\..............\...\.....\......\MajorDS.Designer.cs.dll
........\..............\...\.....\......\ShopDS.Designer.cs.dll
........\..............\...\.....\......\UniversityDS.Designer.cs.dll
........\..............\...\.....\......\UserDS.Designer.cs.dll
........\..............\Properties
........\..............\..........\AssemblyInfo.cs
........\..............\..........\Settings.Designer.cs
........\..............\..........\Settings.settings
........\..............\ShopDS.Designer.cs
........\..............\ShopDS.xsc
........\..............\ShopDS.xsd
........\..............\ShopDS.xss
........\..............\UniversityDS.Designer.cs
........\..............\UniversityDS.xsc
........\..............\UniversityDS.xsd
........\..............\UniversityDS.xss
........\..............\UserDS.Designer.cs
........\..............\UserDS.xsc
........\..............\UserDS.xsd
........\..............\UserDS.xss
........\BusinessObject
........\..............\bin
........\..............\...\Debug
........\..............\...\.....\BusinessEntity.dll
........\..............\...\.....\BusinessEntity.pdb
........\..............\...\.....\BusinessObject.dll
........\..............\...\.....\BusinessObject.pdb
........\..............\...\.....\Common.dll
........\..............\...\.....\Common.pdb
........\..............\...\.....\DataAccessLayer.dll
........\..............\...\.....\DataAccessLayer.pdb
........\..............\...\.....\Microsoft.Practices.EnterpriseLibrary.Data.dll
........\..............\...\.....\Microsoft.Practices.EnterpriseLibrary.Data.xml
........\..............\...\.....\Microsoft.Practices.ObjectBuilder.dll
........\..............\Book.cs
........\..............\BusinessObject.csproj
........\..............\Category.cs
........\..............\obj
........\..............\...\BusinessObject.csproj.FileList.txt
........\..............\...\BusinessObject.csproj.FileListAbsolute.txt
........\..............\...\Debug
........\..............\...\.....\BusinessObject.dll
........\..............\...\.....\BusinessObject.pdb
........\..............\...\.....\Refactor
........\..............\...\.....\........\BusinessObject.dll
........\..............\...\.....\ResolveAssemblyReference.cache
........\