Entity framework先写类，自动创建数据库，只需要修改数据库连接串为你本地，剩下的都是自动完成，如下图
资源文件列表
CodeFirst/CodeFirst/.vs/CodeFirst/v16/.suo , 45568
CodeFirst/CodeFirst/.vs/CodeFirst/v16/Server/sqlite3/db.lock , 0
CodeFirst/CodeFirst/.vs/CodeFirst/v16/Server/sqlite3/storage.ide , 589824
CodeFirst/CodeFirst/CodeFirst.sln , 1144
CodeFirst/CodeFirst/CodeFirstTest/App.config , 1035
CodeFirst/CodeFirst/CodeFirstTest/CodeFirstTest.csproj , 4286
CodeFirst/CodeFirst/CodeFirstTest/Order.cs , 402
CodeFirst/CodeFirst/CodeFirstTest/OrderDetail.cs , 381
CodeFirst/CodeFirst/CodeFirstTest/OrderTestContext.cs , 418
CodeFirst/CodeFirst/CodeFirstTest/Program.cs , 887
CodeFirst/CodeFirst/CodeFirstTest/Properties/AssemblyInfo.cs , 1318
CodeFirst/CodeFirst/CodeFirstTest/bin/Debug/CodeFirstTest.exe , 7680
CodeFirst/CodeFirst/CodeFirstTest/bin/Debug/CodeFirstTest.exe.config , 1035
CodeFirst/CodeFirst/CodeFirstTest/bin/Debug/CodeFirstTest.pdb , 26112
CodeFirst/CodeFirst/CodeFirstTest/bin/Debug/EntityFramework.SqlServer.dll , 591968
CodeFirst/CodeFirst/CodeFirstTest/bin/Debug/EntityFramework.SqlServer.xml , 163193
CodeFirst/CodeFirst/CodeFirstTest/bin/Debug/EntityFramework.dll , 4994632
CodeFirst/CodeFirst/CodeFirstTest/bin/Debug/EntityFramework.xml , 3738289
CodeFirst/CodeFirst/CodeFirstTest/obj/Debug/CodeFirstTest.csproj.CopyComplete , 0
CodeFirst/CodeFirst/CodeFirstTest/obj/Debug/CodeFirstTest.csproj.FileListAbsolute.txt , 858
CodeFirst/CodeFirst/CodeFirstTest/obj/Debug/CodeFirstTest.csprojAssemblyReference.cache , 424
CodeFirst/CodeFirst/CodeFirstTest/obj/Debug/CodeFirstTest.exe , 7680
CodeFirst/CodeFirst/CodeFirstTest/obj/Debug/CodeFirstTest.pdb , 26112
CodeFirst/CodeFirst/CodeFirstTest/obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache , 7109
CodeFirst/CodeFirst/CodeFirstTest/packages.config , 142
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/.signature.p7s , 18711
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/EntityFramework.6.4.0.nupkg , 6394929
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/build/EntityFramework.DefaultItems.props , 304
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/build/EntityFramework.props , 188
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/build/EntityFramework.targets , 6671
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/build/Microsoft.Data.Entity.Build.Tasks.dll , 31816
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/build/netcoreapp3.0/EntityFramework.props , 252
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/build/netcoreapp3.0/EntityFramework.targets , 134
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/buildTransitive/EntityFramework.props , 138
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/buildTransitive/EntityFramework.targets , 140
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/buildTransitive/netcoreapp3.0/EntityFramework.props , 155
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/buildTransitive/netcoreapp3.0/EntityFramework.targets , 157
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/content/net40/App.config.install.xdt , 850
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/content/net40/App.config.transform , 209
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/content/net40/Web.config.install.xdt , 850
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/content/net40/Web.config.transform , 209
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net40/EntityFramework.SqlServer.dll , 586824
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net40/EntityFramework.SqlServer.xml , 153748
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net40/EntityFramework.dll , 4777032
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net40/EntityFramework.xml , 3313592
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net45/EntityFramework.SqlServer.dll , 591968
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net45/EntityFramework.SqlServer.xml , 163193
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net45/EntityFramework.dll , 4994632
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/net45/EntityFramework.xml , 3738289
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/netstandard2.1/EntityFramework.SqlServer.dll , 591432
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/netstandard2.1/EntityFramework.SqlServer.xml , 163193
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/netstandard2.1/EntityFramework.dll , 4980808
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/lib/netstandard2.1/EntityFramework.xml , 3727602
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/EntityFramework6.PS2.psd1 , 15874
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/EntityFramework6.PS2.psm1 , 33212
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/EntityFramework6.psd1 , 17371
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/EntityFramework6.psm1 , 53849
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/about_EntityFramework6.help.txt , 1924
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/init.ps1 , 13993
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/install.ps1 , 14318
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net40/any/ef6.exe , 77888
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net40/any/ef6.pdb , 18680
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net40/win-x86/ef6.exe , 77888
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net40/win-x86/ef6.pdb , 18680
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net45/any/ef6.exe , 78400
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net45/any/ef6.pdb , 18688
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net45/win-x86/ef6.exe , 78400
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/net45/win-x86/ef6.pdb , 18688
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/netcoreapp3.0/any/ef6.dll , 89672
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/netcoreapp3.0/any/ef6.pdb , 19192
CodeFirst/CodeFirst/packages/EntityFramework.6.4.0/tools/netcoreapp3.0/any/ef6.runtimeconfig.json , 167