https://docs.nuget.org/consume/command-line-reference

Installing

The NuGet command line may be installed onto a machine in a few possible ways.

1. Direct download of the executable from https://dist.nuget.org/win-x86-commandline/latest/nuget.exe. The executable may be placed anywhere on the file system, and in most cases should be placed in a directory that is listed in the PATH environment variable.
2. Install the NuGet.CommandLine package from the NuGet Visual Studio client and either move nuget.exe to a common location or execute it in the context of your project.
3. Install the NuGet.CommandLine Chocolatey package using the Chocolatey client. More information on Chocolatey can be found at [http://chocolatey.org].

第一步:下载nuget.exe，然后把这个exe文件放到文件系统的任一位置，并确保这个位置，已经列在环境变量中了。 比如这个路径C:\Windows\system32

第二步:打开VS，随便打开一个项目，解决方案上右键Manage Nuget Packages,选择Browse ,输入NuGet.CommandLine，最后选择最新的版本安装上

第三步:使用Chocolatey客户端安装NuGet.CommandLine  https://chocolatey.org/packages/NuGet.CommandLine

在此之前，还要安装https://chocolatey.org/install

将NuGet配置到环境变量中