如何在 Xamarin 中使用 Windows Box SDK Nuget 包？
How to use the Windows Box SDK Nuget packages with Xamarin?
我正在尝试将 Windows Box SDK (box.com) 集成到 Xamarin 项目中。但是我经常在安装所需的 nuget 包时出错。
我设法安装了普通的 Box.V2 SDK，但我卡在了 Box.V2.JWT SDK 上。我收到此错误：
Attempting to gather dependency information for package 'Box.V2.JWTAuth.1.1.0' with respect to project 'Stuvia', targeting '.NETPortable,Version=v4.6,Profile=Profile44'
Attempting to resolve dependencies for package 'Box.V2.JWTAuth.1.1.0' with DependencyBehavior 'Lowest'
Resolving actions to install package 'Box.V2.JWTAuth.1.1.0'
Resolved actions to install package 'Box.V2.JWTAuth.1.1.0'
Removed package 'Microsoft.Bcl.1.1.8' from 'packages.config'
Added file 'packages.config' to project 'blabla'.
Successfully uninstalled 'Microsoft.Bcl.1.1.8' from Stuvia
Removed package 'Microsoft.Net.Http.2.2.20' from 'packages.config'
Added file 'packages.config' to project 'Stuvia'.
Removed reference 'System.Net.Http.Extensions' from project 'Stuvia'.
Removed reference 'System.Net.Http.Primitives' from project 'Stuvia'.
Successfully uninstalled 'Microsoft.Net.Http.2.2.20' from Stuvia
For adding package 'Microsoft.Bcl.1.1.10' to project 'Stuvia' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Bcl.1.1.10' to project 'Stuvia' that targets 'portable46-net451+win81'.
Adding package 'Microsoft.Bcl.1.1.10' to folder '/Users/HeldeR/Xamarin/Stuvia/packages'
Added package 'Microsoft.Bcl.1.1.10' to folder '/Users/HeldeR/Xamarin/Stuvia/packages'
Added package 'Microsoft.Bcl.1.1.10' to 'packages.config'
Added file 'packages.config' to project 'Stuvia'.
Successfully installed 'Microsoft.Bcl 1.1.10' to blabla
For adding package 'Microsoft.Net.Http.2.2.29' to project 'blabla' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Net.Http.2.2.29' to project 'blabla' that targets 'portable46-net451+win81'.
Adding package 'Microsoft.Net.Http.2.2.29' to folder '/Users/Me/Xamarin/blabla/packages'
Added package 'Microsoft.Net.Http.2.2.29' to folder '/Users/Me/Xamarin/blabla/packages'
Added reference 'System.Net.Http.Extensions' to project 'blabla'.
Added reference 'System.Net.Http.Primitives' to project 'blabla'.
Added package 'Microsoft.Net.Http.2.2.29' to 'packages.config'
Added file 'packages.config' to project 'blabla'.
Successfully installed 'Microsoft.Net.Http 2.2.29' to blabla
For adding package 'System.IdentityModel.Tokens.Jwt.4.0.2.206221351' to project 'blabla' that targets 'portable46-net451+win81'.
Install failed. Rolling back...
Package 'System.IdentityModel.Tokens.Jwt.4.0.2.206221351' does not exist in project 'blabla'
Removed package 'Microsoft.Net.Http.2.2.29 : Microsoft.Bcl [1.1.10, ), Microsoft.Bcl.Build [1.0.14, )' from 'packages.config'
Added file 'packages.config' to project 'blabla'.
Removed reference 'System.Net.Http.Extensions' from project 'blabla'.
Removed reference 'System.Net.Http.Primitives' from project 'blabla'.
Removed package 'Microsoft.Bcl.1.1.10 : Microsoft.Bcl.Build [1.0.14, )' from 'packages.config'
Added file 'packages.config' to project 'blabla'.
For adding package 'Microsoft.Net.Http.2.2.20' to project 'blabla' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Net.Http.2.2.20' to project 'blabla' that targets 'portable46-net451+win81'.
Package 'Microsoft.Net.Http.2.2.20' already exists in folder '/Users/Me/Xamarin/blabla/packages'
Added reference 'System.Net.Http.Extensions' to project 'blabla'.
Added reference 'System.Net.Http.Primitives' to project 'blabla'.
Added package 'Microsoft.Net.Http.2.2.20' to 'packages.config'
Added file 'packages.config' to project 'blabla'.
For adding package 'Microsoft.Bcl.1.1.8' to project 'blabla' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Bcl.1.1.8' to project 'blabla' that targets 'portable46-net451+win81'.
Package 'Microsoft.Bcl.1.1.8' already exists in folder '/Users/Me/Xamarin/blabla/packages'
Added package 'Microsoft.Bcl.1.1.8' to 'packages.config'
Added file 'packages.config' to project 'blabla'.
Package 'System.IdentityModel.Tokens.Jwt.4.0.2.206221351' does not exist in folder '/Users/Me/Xamarin/blabla/packages'
Removing package 'Microsoft.Net.Http.2.2.29 : Microsoft.Bcl [1.1.10, ), Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/portable-net40+sl4+win8+wp71+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/portable-net45+win8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/portable-net45+win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/sl4-windowsphone71'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/Xamarin.iOS10'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/monoandroid'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/monotouch'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/net40'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/net45'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib'.
Removed file 'Microsoft.Net.Http.2.2.29.nupkg' from folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29'.
Removed package 'Microsoft.Net.Http.2.2.29 : Microsoft.Bcl [1.1.10, ), Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Removing package 'Microsoft.Bcl.1.1.10 : Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl4+win8+wp71+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl4+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl5+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net45+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net451+win81+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net45+win8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-win81+wp81+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl4+win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net451+win81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/sl4-windowsphone71'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/Xamarin.iOS10'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/monoandroid'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/monotouch'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/net45'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/net40'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/wp8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/sl4'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/sl5'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib'.
Removed file 'Microsoft.Bcl.1.1.10.nupkg' from folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10'.
Removed package 'Microsoft.Bcl.1.1.10 : Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Could not install package 'System.IdentityModel.Tokens.Jwt 4.0.2.206221351'. You are trying to install this package into a project that targets '.NETPortable,Version=v4.6,Profile=Profile44', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.
所以我为安装普通 Box SDK 所做的是将我的便携式 Xamarin 项目的 Xamarin 配置文件更改为配置文件 44，但我什至不知道这是否可行，而且我无法管理对 JWT SDK 执行相同的操作。
非常感谢任何帮助
移动平台不支持 Box SDK。如果您在 Github 上查看他们的存储库，您会发现这些受支持的平台：
- .NET Framework 4.0.3 及更高版本
- .NET 用于 Windows 商店应用程序
- Silverlight 4 及更高版本
- Windows Phone 7.5 及更高
不包括Xamarin.iOS或Xamarin.Android
另请参阅此问题：https://github.com/box/box-windows-sdk-v2/issues/114
The issue is actually with the jose-jwt library (which would fail as
well). Unfortunately, there are no portable compatible libraries that
support constructing the JWT assertion with RSA private key. That’s
actually why we created a separate Nuget package for JWT support
instead of just adding it to the portable Box.V2 library.
我正在尝试将 Windows Box SDK (box.com) 集成到 Xamarin 项目中。但是我经常在安装所需的 nuget 包时出错。 我设法安装了普通的 Box.V2 SDK，但我卡在了 Box.V2.JWT SDK 上。我收到此错误：
Attempting to gather dependency information for package 'Box.V2.JWTAuth.1.1.0' with respect to project 'Stuvia', targeting '.NETPortable,Version=v4.6,Profile=Profile44'
Attempting to resolve dependencies for package 'Box.V2.JWTAuth.1.1.0' with DependencyBehavior 'Lowest'
Resolving actions to install package 'Box.V2.JWTAuth.1.1.0'
Resolved actions to install package 'Box.V2.JWTAuth.1.1.0'
Removed package 'Microsoft.Bcl.1.1.8' from 'packages.config'
Added file 'packages.config' to project 'blabla'.
Successfully uninstalled 'Microsoft.Bcl.1.1.8' from Stuvia
Removed package 'Microsoft.Net.Http.2.2.20' from 'packages.config'
Added file 'packages.config' to project 'Stuvia'.
Removed reference 'System.Net.Http.Extensions' from project 'Stuvia'.
Removed reference 'System.Net.Http.Primitives' from project 'Stuvia'.
Successfully uninstalled 'Microsoft.Net.Http.2.2.20' from Stuvia
For adding package 'Microsoft.Bcl.1.1.10' to project 'Stuvia' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Bcl.1.1.10' to project 'Stuvia' that targets 'portable46-net451+win81'.
Adding package 'Microsoft.Bcl.1.1.10' to folder '/Users/HeldeR/Xamarin/Stuvia/packages'
Added package 'Microsoft.Bcl.1.1.10' to folder '/Users/HeldeR/Xamarin/Stuvia/packages'
Added package 'Microsoft.Bcl.1.1.10' to 'packages.config'
Added file 'packages.config' to project 'Stuvia'.
Successfully installed 'Microsoft.Bcl 1.1.10' to blabla
For adding package 'Microsoft.Net.Http.2.2.29' to project 'blabla' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Net.Http.2.2.29' to project 'blabla' that targets 'portable46-net451+win81'.
Adding package 'Microsoft.Net.Http.2.2.29' to folder '/Users/Me/Xamarin/blabla/packages'
Added package 'Microsoft.Net.Http.2.2.29' to folder '/Users/Me/Xamarin/blabla/packages'
Added reference 'System.Net.Http.Extensions' to project 'blabla'.
Added reference 'System.Net.Http.Primitives' to project 'blabla'.
Added package 'Microsoft.Net.Http.2.2.29' to 'packages.config'
Added file 'packages.config' to project 'blabla'.
Successfully installed 'Microsoft.Net.Http 2.2.29' to blabla
For adding package 'System.IdentityModel.Tokens.Jwt.4.0.2.206221351' to project 'blabla' that targets 'portable46-net451+win81'.
Install failed. Rolling back...
Package 'System.IdentityModel.Tokens.Jwt.4.0.2.206221351' does not exist in project 'blabla'
Removed package 'Microsoft.Net.Http.2.2.29 : Microsoft.Bcl [1.1.10, ), Microsoft.Bcl.Build [1.0.14, )' from 'packages.config'
Added file 'packages.config' to project 'blabla'.
Removed reference 'System.Net.Http.Extensions' from project 'blabla'.
Removed reference 'System.Net.Http.Primitives' from project 'blabla'.
Removed package 'Microsoft.Bcl.1.1.10 : Microsoft.Bcl.Build [1.0.14, )' from 'packages.config'
Added file 'packages.config' to project 'blabla'.
For adding package 'Microsoft.Net.Http.2.2.20' to project 'blabla' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Net.Http.2.2.20' to project 'blabla' that targets 'portable46-net451+win81'.
Package 'Microsoft.Net.Http.2.2.20' already exists in folder '/Users/Me/Xamarin/blabla/packages'
Added reference 'System.Net.Http.Extensions' to project 'blabla'.
Added reference 'System.Net.Http.Primitives' to project 'blabla'.
Added package 'Microsoft.Net.Http.2.2.20' to 'packages.config'
Added file 'packages.config' to project 'blabla'.
For adding package 'Microsoft.Bcl.1.1.8' to project 'blabla' that targets 'portable46-net451+win81'.
For adding package 'Microsoft.Bcl.1.1.8' to project 'blabla' that targets 'portable46-net451+win81'.
Package 'Microsoft.Bcl.1.1.8' already exists in folder '/Users/Me/Xamarin/blabla/packages'
Added package 'Microsoft.Bcl.1.1.8' to 'packages.config'
Added file 'packages.config' to project 'blabla'.
Package 'System.IdentityModel.Tokens.Jwt.4.0.2.206221351' does not exist in folder '/Users/Me/Xamarin/blabla/packages'
Removing package 'Microsoft.Net.Http.2.2.29 : Microsoft.Bcl [1.1.10, ), Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/portable-net40+sl4+win8+wp71+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/portable-net45+win8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/portable-net45+win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/sl4-windowsphone71'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/Xamarin.iOS10'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/monoandroid'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/monotouch'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/net40'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/net45'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib/win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29/lib'.
Removed file 'Microsoft.Net.Http.2.2.29.nupkg' from folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Net.Http.2.2.29'.
Removed package 'Microsoft.Net.Http.2.2.29 : Microsoft.Bcl [1.1.10, ), Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Removing package 'Microsoft.Bcl.1.1.10 : Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl4+win8+wp71+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl4+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl5+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net45+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+win8+wp8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net451+win81+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net45+win8+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-win81+wp81+wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+sl4+win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net451+win81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/portable-net40+win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/sl4-windowsphone71'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/Xamarin.iOS10'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/monoandroid'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/monotouch'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/net45'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/wpa81'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/net40'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/win8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/wp8'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/sl4'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib/sl5'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10/lib'.
Removed file 'Microsoft.Bcl.1.1.10.nupkg' from folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10'.
Removed folder '/Users/Me/Xamarin/blabla/packages/Microsoft.Bcl.1.1.10'.
Removed package 'Microsoft.Bcl.1.1.10 : Microsoft.Bcl.Build [1.0.14, )' from folder '/Users/Me/Xamarin/blabla/packages'
Could not install package 'System.IdentityModel.Tokens.Jwt 4.0.2.206221351'. You are trying to install this package into a project that targets '.NETPortable,Version=v4.6,Profile=Profile44', but the package does not contain any assembly references or content files that are compatible with that framework. For more information, contact the package author.
所以我为安装普通 Box SDK 所做的是将我的便携式 Xamarin 项目的 Xamarin 配置文件更改为配置文件 44，但我什至不知道这是否可行，而且我无法管理对 JWT SDK 执行相同的操作。 非常感谢任何帮助
移动平台不支持 Box SDK。如果您在 Github 上查看他们的存储库，您会发现这些受支持的平台：
- .NET Framework 4.0.3 及更高版本
- .NET 用于 Windows 商店应用程序
- Silverlight 4 及更高版本
- Windows Phone 7.5 及更高
不包括Xamarin.iOS或Xamarin.Android
另请参阅此问题：https://github.com/box/box-windows-sdk-v2/issues/114
The issue is actually with the jose-jwt library (which would fail as well). Unfortunately, there are no portable compatible libraries that support constructing the JWT assertion with RSA private key. That’s actually why we created a separate Nuget package for JWT support instead of just adding it to the portable Box.V2 library.