问题描述
我有一个针对Microsoft.NETCore.App 1.1.2的dotnet核心应用程序。我创建了一个测试项目来对该项目进行测试，但是在构建时我注意到了以下警告：
我的问题是Visual Studio不允许我更新该版本，所以我对如何解决此问题感到困惑：
理想情况下，我只是单击下拉列表并选择正确的版本，但是Visual Studio声称由于项目或packages.config中的其他约束，它无法执行此操作。我应该如何更新该软件包？ Visual Studio指的是附加约束？
EDIT 2018 ：仅遵循说明如果您真的知道自己在做什么，则可以更新软件包。在大多数情况下，您无需手动更新此程序包或其他标记为被项目阻止的程序包。依赖于框架的应用程序将使用可用的最新运行时，而独立的应用程序将自动使用此程序包的较新版本执行额外的构建。 （在某些极端情况下，您需要在测试项目中升级此软件包。在这种情况下，请添加< TargetLatestRuntimePatch> true< /…> 和。
隐式包引用了 Microsoft.NET.Sdk 推断无法通过NuGet进行更新。
如果从project.json迁移，则该项目 1.1.0 引用可能包含
< RuntimeFrameworkVersion> 1.1 .0< / RuntimeFrameworkVersion> csproj文件或类似项目中的
（如果您以前使用过程序包管理器来设置版本）：
< PackageReference Update = Microsoft.NETCore.App Version = 1.1.0 />
删除上述内容，所有软件包均引用 1.1.2 （或任何已安装的SDK认为是最新的）。
或者，在所有项目中设置 RuntimeFrameworkVersion 。
I have a dotnet core app that is targetting Microsoft.NETCore.App 1.1.2. I created a test project to test against that project but when building I noticed this warning:
I open the NuGet Package Manager and see that warning is correct, the project being tested has a different version of Microsoft.NETCore.App:
My problem is that Visual Studio is not letting me update that version, so I'm confused on how to solve this issue:Ideally I would just click the dropdown and select the right version but Visual Studio claims that it cannot do this because of "additional constraints in the project or packages.config". How am I supposed to update that package? What "additional constraints" is Visual Studio referring to?
EDIT 2018: Only follow the instructions for updating the package if you really know what you are doing. In most cases, you never need to update this package - or other packages marked as "blocked by project" - manually. A framework-dependent app will use the latest runtime available and a self-contained application will perform an extra build using a newer version of this package automatically. (there are some edge cases where you need to upgrade this package in test projects. in this case, add <TargetLatestRuntimePatch>true</…> and see this Q&A for other options)
The implicit package references that the Microsoft.NET.Sdk infers can't be updated via NuGet.
If you migrated from project.json, the project with the 1.1.0 reference likely contains
<RuntimeFrameworkVersion>1.1.0</RuntimeFrameworkVersion>
in the csproj file or an item like this (if you may used the package manager previously to set the version):
<PackageReference Update="Microsoft.NETCore.App" Version="1.1.0" />
Delete entries like the above and all packages will reference 1.1.2 (or whatever the installed SDK considers to be the latest) automatically.Alernatively, set RuntimeFrameworkVersion in all projects.
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