Microsoft .net Framework 4 Multi Targeting Pack [hot] Direct

例如，即使你的电脑上实际运行时只能支持 .NET Framework 4.5 的特性，只要通过 MSBuild（以及 Visual Studio 的设计时支持），你同样可以编写和编译一个仅针对 .NET Framework 4.0 开发的应用，以确保它与更低版本的环境向后兼容。这种特性使得 Visual Studio 的代码编辑器（如 IntelliSense）只会显示你所针对的 Framework 版本的 API 接口。如果你的代码调用了仅在更高版本中才存在的 API，编译器会立刻抛出错误提示。这极大地避免了在开发环境中使用高版本语法而导致在服务器部署运行时出现缺少方法异常的惨剧。

vs_enterprise.exe --layout c:\vslayout --add Microsoft.Net.4.TargetingPack --add Microsoft.Net.4.5.TargetingPack microsoft .net framework 4 multi targeting pack

The Microsoft .NET Framework 4 Multi-Targeting Pack is a software package developed by Microsoft that allows developers to target multiple versions of the .NET Framework from a single development environment. This pack is a essential tool for developers who need to create applications that can run on different versions of the .NET Framework. 例如，即使你的电脑上实际运行时只能支持

It is bundled automatically when selecting workloads related to legacy desktop or web development, specifically under the individual components tab for .NET framework targeting. The runtime is for , while the targeting

The runtime is for , while the targeting pack is for compilation . The targeting pack provides the reference assemblies that the compiler needs to validate code and resolve types at build time. Having the runtime installed does not automatically provide these reference assemblies for development purposes.