该实例实现了：
- 添加列
- 定制化迁移
- 数据移动/定制sql
- 在应用程序启动时自动升级（MigrateDatabaseToLatestVersion初始化器）
只需要配置下app.config中的数据库连接串，即可自动生成数据库以及表结构，具体如下:
资源文件列表
.gitattributes , 483
.gitignore , 501
App.config , 1189
Migrations/201407170833142_InitialCreate.Designer.cs , 825
Migrations/201407170833142_InitialCreate.cs , 621
Migrations/201407170833142_InitialCreate.resx , 7144
Migrations/201407170845118_AddBlogUrl.Designer.cs , 816
Migrations/201407170845118_AddBlogUrl.cs , 389
Migrations/201407170845118_AddBlogUrl.resx , 7144
Migrations/201407170859167_AddPostClass.Designer.cs , 822
Migrations/201407170859167_AddPostClass.cs , 1148
Migrations/201407170859167_AddPostClass.resx , 7776
Migrations/201407170906287_addpostAbstract.Designer.cs , 831
Migrations/201407170906287_addpostAbstract.cs , 499
Migrations/201407170906287_addpostAbstract.resx , 7804
Migrations/Configuration.cs , 1053
MigrationsDemo.csproj , 7359
MigrationsDemo.csproj.user , 498
MigrationsDemo.sln , 1123
Model.cs , 843
Program.cs , 771
Properties/AssemblyInfo.cs , 1404
README.md , 159
bin/Debug/EntityFramework.SqlServer.dll , 622288
bin/Debug/EntityFramework.SqlServer.xml , 158388
bin/Debug/EntityFramework.SqlServerCompact.dll , 295632
bin/Debug/EntityFramework.SqlServerCompact.xml , 67579
bin/Debug/EntityFramework.dll , 5225168
bin/Debug/EntityFramework.xml , 3680079
bin/Debug/MigrationsDemo.BlogContext.sdf , 131072
bin/Debug/MigrationsDemo.exe , 24064
bin/Debug/MigrationsDemo.exe.config , 1189
bin/Debug/MigrationsDemo.pdb , 44544
bin/Debug/System.Data.SqlServerCe.dll , 470240
bin/Debug/amd64/Microsoft.VC90.CRT/Microsoft.VC90.CRT.manifest , 1862
bin/Debug/amd64/Microsoft.VC90.CRT/README_ENU.txt , 406
bin/Debug/amd64/Microsoft.VC90.CRT/msvcr90.dll , 624448
bin/Debug/amd64/sqlceca40.dll , 463584
bin/Debug/amd64/sqlcecompact40.dll , 106720
bin/Debug/amd64/sqlceer40EN.dll , 154848
bin/Debug/amd64/sqlceme40.dll , 81120
bin/Debug/amd64/sqlceqp40.dll , 909536
bin/Debug/amd64/sqlcese40.dll , 561888
bin/Debug/x86/Microsoft.VC90.CRT/Microsoft.VC90.CRT.manifest , 1860
bin/Debug/x86/Microsoft.VC90.CRT/README_ENU.txt , 406
bin/Debug/x86/Microsoft.VC90.CRT/msvcr90.dll , 653120
bin/Debug/x86/sqlceca40.dll , 349920
bin/Debug/x86/sqlcecompact40.dll , 90848
bin/Debug/x86/sqlceer40EN.dll , 154336
bin/Debug/x86/sqlceme40.dll , 67296
bin/Debug/x86/sqlceqp40.dll , 642784
bin/Debug/x86/sqlcese40.dll , 406240
obj/Debug/DesignTimeResolveAssemblyReferencesInput.cache , 7516
obj/Debug/MigrationsDemo.Migrations.AddBlogUrl.resources , 1540
obj/Debug/MigrationsDemo.Migrations.AddPostClass.resources , 2172
obj/Debug/MigrationsDemo.Migrations.InitialCreate.resources , 1540
obj/Debug/MigrationsDemo.Migrations.addpostAbstract.resources , 2200
obj/Debug/MigrationsDemo.csproj.CopyComplete , 0
obj/Debug/MigrationsDemo.csproj.CoreCompileInputs.cache , 42
obj/Debug/MigrationsDemo.csproj.FileListAbsolute.txt , 2260
obj/Debug/MigrationsDemo.csproj.GenerateResource.cache , 1251
obj/Debug/MigrationsDemo.csprojResolveAssemblyReference.cache , 58513
obj/Debug/MigrationsDemo.exe , 24064
obj/Debug/MigrationsDemo.pdb , 44544
obj/Debug/TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs , 0
obj/Debug/TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs , 0
obj/Debug/TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs , 0
packages/EntityFramework.6.2.0/EntityFramework.6.2.0.nupkg , 4283636
packages/EntityFramework.6.2.0/content/net40/App.config.transform , 209
packages/EntityFramework.6.2.0/content/net40/Web.config.transform , 209
packages/EntityFramework.6.2.0/lib/net40/EntityFramework.SqlServer.dll , 616656
packages/EntityFramework.6.2.0/lib/net40/EntityFramework.SqlServer.xml , 148963
packages/EntityFramework.6.2.0/lib/net40/EntityFramework.dll , 5003984
packages/EntityFramework.6.2.0/lib/net40/EntityFramework.xml , 3256661
packages/EntityFramework.6.2.0/lib/net45/EntityFramework.SqlServer.dll , 622288
packages/EntityFramework.6.2.0/lib/net45/EntityFramework.SqlServer.xml , 158388
packages/EntityFramework.6.2.0/lib/net45/EntityFramework.dll , 5225168
packages/EntityFramework.6.2.0/lib/net45/EntityFramework.xml , 3680079
packages/EntityFramework.6.2.0/tools/EntityFramework.PowerShell.Utility.dll , 13520
packages/EntityFramework.6.2.0/tools/EntityFramework.PowerShell.dll , 50384
packages/EntityFramework.6.2.0/tools/EntityFramework.psd1 , 24836
packages/EntityFramework.6.2.0/tools/EntityFramework.psm1 , 44793
packages/EntityFramework.6.2.0/tools/about_EntityFramework.help.txt , 1970
packages/EntityFramework.6.2.0/tools/init.ps1 , 10028
packages/EntityFramework.6.2.0/tools/install.ps1 , 10141
packages/EntityFramework.6.2.0/tools/migrate.exe , 542928
packages/EntityFramework.SqlServerCompact.6.2.0/EntityFramework.SqlServerCompact.6.2.0.nupkg , 178579
packages/EntityFramework.SqlServerCompact.6.2.0/content/net40/App.config.transform , 680
packages/EntityFramework.SqlServerCompact.6.2.0/content/net40/Web.config.transform , 678
packages/EntityFramework.SqlServerCompact.6.2.0/lib/net40/EntityFramework.SqlServerCompact.dll , 296144
packages/EntityFramework.SqlServerCompact.6.2.0/lib/net40/EntityFramework.SqlServerCompact.xml , 67579
packages/EntityFramework.SqlServerCompact.6.2.0/lib/net45/EntityFramework.SqlServerCompact.dll , 295632
packages/EntityFramework.SqlServerCompact.6.2.0/lib/net45/EntityFramework.SqlServerCompact.xml , 67579
packages/EntityFramework.SqlServerCompact.6.2.0/tools/install.ps1 , 10187
packages/Microsoft.SqlServer.Compact.4.0.8876.1/Content/web.config.transform , 541
packages/Microsoft.SqlServer.Compact.4.0.8876.1/Microsoft.SqlServer.Compact.4.0.8876.1.nupkg , 2637939
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/Microsoft.VC90.CRT/Microsoft.VC90.CRT.manifest , 1862
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/Microsoft.VC90.CRT/README_ENU.txt , 406
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/Microsoft.VC90.CRT/msvcr90.dll , 624448
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/sqlceca40.dll , 463584
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/sqlcecompact40.dll , 106720
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/sqlceer40EN.dll , 154848
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/sqlceme40.dll , 81120
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/sqlceqp40.dll , 909536
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/amd64/sqlcese40.dll , 561888
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/Microsoft.VC90.CRT/Microsoft.VC90.CRT.manifest , 1860
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/Microsoft.VC90.CRT/README_ENU.txt , 406
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/Microsoft.VC90.CRT/msvcr90.dll , 653120
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/sqlceca40.dll , 349920
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/sqlcecompact40.dll , 90848
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/sqlceer40EN.dll , 154336
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/sqlceme40.dll , 67296
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/sqlceqp40.dll , 642784
packages/Microsoft.SqlServer.Compact.4.0.8876.1/NativeBinaries/x86/sqlcese40.dll , 406240
packages/Microsoft.SqlServer.Compact.4.0.8876.1/SQLCE_EULA_ENU.rtf , 172405
packages/Microsoft.SqlServer.Compact.4.0.8876.1/lib/net40/System.Data.SqlServerCe.dll , 470240
packages/Microsoft.SqlServer.Compact.4.0.8876.1/tools/Install.ps1 , 12090
packages/Microsoft.SqlServer.Compact.4.0.8876.1/tools/Uninstall.ps1 , 11633
packages/Microsoft.SqlServer.Compact.4.0.8876.1/tools/VS.psd1 , 11920
packages/Microsoft.SqlServer.Compact.4.0.8876.1/tools/VS.psm1 , 14446
packages.config , 328