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Showing content from https://docs.microsoft.com/en-us/dotnet/core/tools/dotnet-add-package below:

dotnet package add command - .NET CLI

This article applies to: ✔️ .NET Core 3.1 SDK and later versions

dotnet package add - Adds or updates a package reference in a project file.

Note

If you're using .NET 9 SDK or earlier, use the "verb first" form (dotnet add package) instead. The "noun first" form was introduced in .NET 10. For more information, see More consistent command order.

dotnet package add <PACKAGE_NAME>
    [-f|--framework <FRAMEWORK>] [--interactive] [--project <PROJECT>]
    [-n|--no-restore] [--package-directory <PACKAGE_DIRECTORY>]
    [--prerelease] [-s|--source <SOURCE>] [-v|--version <VERSION>]

dotnet package add -h|--help

The dotnet package add command provides a convenient option to add or update a package reference in a project file. When you run the command, there's a compatibility check to ensure the package is compatible with the frameworks in the project. If the check passes and the package isn't referenced in the project file, a <PackageReference> element is added to the project file. If the check passes and the package is already referenced in the project file, the <PackageReference> element is updated to the latest compatible version. After the project file is updated, dotnet restore is run.

For example, adding Microsoft.EntityFrameworkCore to ToDo.csproj produces output similar to the following example:

  Determining projects to restore...
  Writing C:\Users\username\AppData\Local\Temp\tmp24A8.tmp
info : Adding PackageReference for package 'Microsoft.EntityFrameworkCore' into project 'C:\ToDo\ToDo.csproj'.
info :   CACHE https://api.nuget.org/v3/registration5-gz-semver2/microsoft.entityframeworkcore/index.json
info :   GET https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/516521bf-6417-457e-9a9c-0a4bdfde03e7/nuget/v3/registrations2-semver2/microsoft.entityframeworkcore/index.json
info :   CACHE https://api.nuget.org/v3/registration5-gz-semver2/microsoft.entityframeworkcore/page/0.0.1-alpha/3.1.3.json
info :   CACHE https://api.nuget.org/v3/registration5-gz-semver2/microsoft.entityframeworkcore/page/3.1.4/7.0.0-preview.2.22153.1.json
info :   CACHE https://api.nuget.org/v3/registration5-gz-semver2/microsoft.entityframeworkcore/page/7.0.0-preview.3.22175.1/7.0.0-preview.3.22175.1.json
info :   NotFound https://pkgs.dev.azure.com/dnceng/9ee6d478-d288-47f7-aacc-f6e6d082ae6d/_packaging/516521bf-6417-457e-9a9c-0a4bdfde03e7/nuget/v3/registrations2-semver2/microsoft.entityframeworkcore/index.json 257ms
info : Restoring packages for C:\ToDo\ToDo.csproj...
info : Package 'Microsoft.EntityFrameworkCore' is compatible with all the specified frameworks in project 'C:\ToDo\ToDo.csproj'.
info : PackageReference for package 'Microsoft.EntityFrameworkCore' version '6.0.4' added to file 'C:\ToDo\ToDo.csproj'.
info : Writing assets file to disk. Path: C:\ToDo\obj\project.assets.json
log  : Restored C:\ToDo\ToDo.csproj (in 171 ms).

The ToDo.csproj file now contains a <PackageReference> element for the referenced package.

<PackageReference Include="Microsoft.EntityFrameworkCore" Version="6.0.4" />

If the project is onboarded onto Central Package Management (CPM) the <PackageVersion> element in the Directory.Packages.props file is added/updated and the <PackageReference> element is added to the project file.

The following scenarios are currently supported. These examples assume that the latest version of Microsoft.EntityFrameworkCore is 6.0.4. Additional scenarios related to CPM are documented in this design spec.

Scenario 1: <PackageReference> does not exist in the project file, <PackageVersion> element does not exist in the Directory.Packages.props file, and the version argument is not passed from the commandline.

CLI command that is executed: dotnet package add Microsoft.EntityFrameworkCore --project ToDo.csproj

The <PackageVersion> element is added to the Directory.Packages.props file.

<PackageVersion Include="Microsoft.EntityFrameworkCore" Version="6.0.4" />

The <PackageReference> element is added to the project file.

<PackageReference Include="Microsoft.EntityFrameworkCore" />

Scenario 2: <PackageReference> does not exist in the project file, <PackageVersion> element does not exist in the Directory.Packages.props file, and the version argument is passed from the commandline.

CLI command that is executed: dotnet package add Microsoft.EntityFrameworkCore --version 5.0.4 --project ToDo.csproj

The <PackageVersion> element is added to the Directory.Packages.props file.

<PackageVersion Include="Microsoft.EntityFrameworkCore" Version="5.0.4" />

The <PackageReference> element is added to the project file.

<PackageReference Include="Microsoft.EntityFrameworkCore" />

Scenario 3: <PackageReference> does not exist in the project file, <PackageVersion> element does exist in the Directory.Packages.props file, and the version argument is not passed from the commandline.

CLI command that is executed: dotnet package add Microsoft.EntityFrameworkCore --project ToDo.csproj

The <PackageVersion> element is added to the Directory.Packages.props file.

<PackageVersion Include="Microsoft.EntityFrameworkCore" Version="6.0.4" />

The <PackageReference> element is added to the project file.

<PackageReference Include="Microsoft.EntityFrameworkCore" />

Scenario 4: <PackageReference> does not exist in the project file, <PackageVersion> element does exist in the Directory.Packages.props file, and the version argument is passed from the commandline.

CLI command that is executed: dotnet package add Microsoft.EntityFrameworkCore --version 5.0.4 --project ToDo.csproj

The <PackageVersion> element is added to the Directory.Packages.props file.

<PackageVersion Include="Microsoft.EntityFrameworkCore" Version="5.0.4" />

The <PackageReference> element is added to the project file.

<PackageReference Include="Microsoft.EntityFrameworkCore" />

You don't have to run dotnet restore because it's run implicitly by all commands that require a restore to occur, such as dotnet new, dotnet build, dotnet run, dotnet test, dotnet publish, and dotnet pack. To disable implicit restore, use the --no-restore option.

The dotnet restore command is still useful in certain scenarios where explicitly restoring makes sense, such as continuous integration builds in Azure DevOps Services or in build systems that need to explicitly control when the restore occurs.

For information about how to manage NuGet feeds, see the dotnet restore documentation.

• PROJECT

  Specifies the project file. If not specified, the command searches the current directory for one.

• PACKAGE_NAME

  The package reference to add.

• -f|--framework <FRAMEWORK>

  Adds a package reference only when targeting a specific framework.

• -?|-h|--help

  Prints out a description of how to use the command.

• --interactive

  Allows the command to stop and wait for user input or action. For example, to complete authentication.

• -n|--no-restore

  Adds a package reference without performing a restore preview and compatibility check.

• --package-directory <PACKAGE_DIRECTORY>

  The directory where to restore the packages. The default package restore location is %userprofile%\.nuget\packages on Windows and ~/.nuget/packages on macOS and Linux. For more information, see Managing the global packages, cache, and temp folders in NuGet.

• --prerelease

  Allows prerelease packages to be installed. Available since .NET Core 5 SDK

• -s|--source <SOURCE>

  The URI of the NuGet package source to use during the restore operation.

• -v|--version <VERSION>

  Version of the package. See NuGet package versioning.

• Add Microsoft.EntityFrameworkCore NuGet package to a project:

  dotnet package add Microsoft.EntityFrameworkCore
  

• Add a specific version of a package to a project:

  dotnet package add Microsoft.Azure.DocumentDB.Core -v 1.0.0 --project ToDo.csproj
  

• Add a package using a specific NuGet source:

  dotnet package add Microsoft.AspNetCore.StaticFiles -s https://dotnet.myget.org/F/dotnet-core/api/v3/index.json
  

• Managing the global packages, cache, and temp folders in NuGet
• NuGet package versioning

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