The offline package of NuGet don't be install

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hi my pc don't connect to internet.
i download some package of nuget from internet.
but when i install them in console of vs2015, the below errors would appeared:

Install-Package : The current environment doesn't have a solution open.
At line:1 char:16
+ Install-Package <<<< bootstrap -Version 4.3.1
+ CategoryInfo : InvalidOperation: (:) [Install-Package], InvalidOperationException
+ FullyQualifiedErrorId : NuGetNoActiveSolution,NuGet.PackageManagement.Powe rShellCmdlets.InstallPackageCommand

Install-Package : Project 'Default' is not found.
At line:1 char:16
+ Install-Package <<<< bootstrap -Version 4.3.1
+ CategoryInfo : ObjectNotFound: (Default:String) [Install-Package], ItemNotFoundException
+ FullyQualifiedErrorId : NuGetProjectNotFound,NuGet.PackageManagement.Power ShellCmdlets.InstallPackageCommand

Install-Package : Unable to load the service index for source https://www.nuget.org/api/v2/curated...crosoftdotnet/.
At line:1 char:16
+ Install-Package <<<< bootstrap -Version 4.3.1
+ CategoryInfo : NotSpecified: (:) [Install-Package], Exception
+ FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PackageManagem ent.PowerShellCmdlets.InstallPackageComman

What I have tried:

i try very times. but i don't receive any result.

.........

Posted 18-Oct-19 6:59am

Member 13522501

Updated 18-Oct-19 8:05am

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Richard Deeming 18-Oct-19 13:34pm

Make sure you've opened the project that needs to reference the packages before you try to install them.

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OriginalGriff · Answer 1 · 2019-10-18T08:05:00

Nuget downloads packages, installs them to the active project in a solution, and adds the references as required. If you have no solution open, aor no current project within a solution, it has nowhere to add the package data to, and nowhere to add references.

Open a solution, run Nuget offline[^] and it should add the references to the current project - the one containing the file you are viewing.

Think about it: not all projects on a machine (much less all solutions!) need all Nuget packages - so you need to be able to specify which projects do - and that's by having it open when you run Nuget.
If you have multiple projects in a solution that all need the packages, you will have to run Nuget separately for each relevant project.