我应该如何在 VS 2017 RC 中创建针对 .NET Framework 4.5.1 和 .NET Standard

问题描述

这是我第一次尝试不仅仅针对 .NET Framework 的任何东西.我似乎无法从 GUI 中做到这一点.我已经尝试过项目类型类库(便携式)"和项目类型类库(.NET 标准)".我可以将类库(便携式)"更改为以 .NET Standard 为目标，但我无法选择其他任何内容.我不确定是否应该尝试更改类库(.NET 标准)"的 .csproj 或类库(便携式)"的 project.json，我只想要最适合未来的东西.

This is my first time trying anything that targets more than just a .NET Framework. I can't seem to do it from the GUI. I've tried project type 'Class Library (Portable)' and project type 'Class Library (.NET Standard)'. I can change a 'Class Library (Portable)' to target .NET Standard but then I can't select anything else. I'm not sure if I should try to change the .csproj of 'Class Library (.NET Standard)' or the project.json of 'Class Library (Portable)', I just want whatever is most future-proof.

推荐答案

截至几天前，.csproj 已经被简化并且易用性得到了提高.使用最新版本的 VS 2017 RC，我通过创建一个新的类库(.NET 标准)"来创建这样一个库，它具有这个默认的 .csproj:

As of a few days ago the .csproj has been simplified and ease of use has improved. With the latest version of VS 2017 RC, I create such a library by creating a new 'Class Library (.NET Standard)', which has this default .csproj:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>netstandard1.4</TargetFramework>
  </PropertyGroup>
</Project>

我手动编辑它(我看不到通过 UI 进行编辑的方法)是这样的:

And I edit it by hand (I don't see a way to do it through the UI) to be this:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFrameworks>netstandard1.3;net452</TargetFrameworks>
  </PropertyGroup>
</Project>

项目的属性"窗格下的目标框架"下拉菜单随即变为灰色.通过构建，您可以验证 binDebug 下的单独 netstandard1.3 和 net452 文件夹.如果您在构建时创建 NuGet 包，请注意以下问题，这可能会误导您认为您做错了什么:https://github.com/NuGet/Home/issues/4289.

The 'Target framework' drop down under the project's Properties pane then becomes grayed out. By building you can verify separate netstandard1.3 and net452 folders under binDebug. Be aware of the following issue if you're creating a NuGet package on build, which may mislead you into thinking you've done something incorrectly: https://github.com/NuGet/Home/issues/4289.

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