What do Yellow Warning Triangles mean on Dependencies in Visual Studio 2017?

As trite as it sounds, try rebuilding then restarting VS - and get on with your day :)


run dotnet restore before you do any complicated manipulation, you are going to be provided with a lot more info than in the error window or solution explorer.

You can run this command in the Package Manager Console:

Tools > NuGet Package Manager > Package Manager Console


In the build Log I happened to notice this:

C:\Program Files\dotnet\sdk\2.0.2\Sdks\Microsoft.NET.Sdk\build\Microsoft.NET.Sdk.DefaultItems.targets(199,5): warning : A PackageReference for 'NETStandard.Library' was included in your project. This package is implicitly referenced by the .NET SDK and you do not typically need to reference it from your project. For more information, see https://aka.ms/sdkimplicitrefs

I therefore went and uninstalled all packages that were listed as dependencies for the .Net Standard nuget listed here:

.NETStandard 1.1

  • Microsoft.NETCore.Platforms (>= 1.1.0)

  • System.Collections (>= 4.3.0)

  • System.Collections.Concurrent (>= 4.3.0)

  • System.Diagnostics.Debug (>=> 4.3.0)

  • System.Diagnostics.Tools (>= 4.3.0)

  • System.Diagnostics.Tracing (>= 4.3.0)

  • System.Globalization (>= 4.3.0)

  • System.IO (>= 4.3.0)

  • System.IO.Compression (>= 4.3.0)

  • System.Linq (>= 4.3.0)

  • System.Linq.Expressions (>= 4.3.0)

  • System.Net.Http (>= 4.3.2)

  • System.Net.Primitives (>= 4.3.0)

  • System.ObjectModel (>= 4.3.0)

  • System.Reflection (>= 4.3.0)

  • System.Reflection.Extensions (>= 4.3.0)

  • System.Reflection.Primitives (>= 4.3.0)

  • System.Resources.ResourceManager (>= 4.3.0)

  • System.Runtime (>= 4.3.0)

  • System.Runtime.Extensions (>= 4.3.0)

  • System.Runtime.InteropServices (>= 4.3.0)

  • System.Runtime.InteropServices.RuntimeInformation (>=> 4.3.0)

  • System.Runtime.Numerics (>= 4.3.0)

  • System.Text.Encoding (>= 4.3.0)

  • System.Text.Encoding.Extensions (>= 4.3.0)

  • System.Text.RegularExpressions (>= 4.3.0)

  • System.Threading (>= 4.3.0)

  • System.Threading.Tasks (>= 4.3.0)

  • System.Xml.ReaderWriter (>= 4.3.0)

  • System.Xml.XDocument (>= 4.3.0)

And the yellow warnings disappeared.

From here: https://blogs.msdn.microsoft.com/dotnet/2017/08/14/announcing-net-standard-2-0/

I have also found you can use the NoWarn property like below:

<ItemGroup>
  <PackageReference Include="Huitian.PowerCollections" Version="1.0.0" NoWarn="NU1701" />
</ItemGroup>

Tags:

Nuget

Visual Studio 2017

.Net Standard

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