VS2017 The operation failed as details for project could not be loaded

nugetvisual-studio-2017

I edit the project.csproj. and re-open the solution the errors occurred:
The operation failed as details for project xxx could not be loaded

I try delete obj & bin folder, clear the nuget cache by tool>options.
but the error still exist.

Remark: the error do not occur each time, i just restart the project three times. the first and second is correct. but the third the error occur

vs2017:
Microsoft Visual Studio Community 2017
Version 15.0.26228.9 D15RTWSVC
Microsoft .NET Framework
Version 4.6.01586

Package Manager Console Host Version 4.0.0.2323

Best Answer

I've faced the problem several times, and all but one were solved by just closing and then restarting visual studio 2017. So if you've not, please try restarting VS, then if that fails, look for more serious solutions.

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Nuget versioning issue with package restore

It looks like problem in nuget command line tool. When you enable 'Nuget package restore' feature it adds .nuget folder to you solution with nuget.exe. And when you compile project this tool is using to download missing packages, not VS extension is used here. So try update this tool from command line:

cd .nuget
nuget.exe update -Self

Procedure screenshot:

enter image description here

C# – find a NuGet package for upgrading to System.Web.Http v5.0.0.0

You need the Microsoft.AspNet.WebApi.Core package.

You can see it in the .csproj file:

<Reference Include="System.Web.Http, Version=5.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35, processorArchitecture=MSIL">
  <SpecificVersion>False</SpecificVersion>
  <HintPath>..\packages\Microsoft.AspNet.WebApi.Core.5.0.0\lib\net45\System.Web.Http.dll</HintPath>
</Reference>

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