When you are done building your final NuGet package, you may want to push/upload it to the NuGet gallery. It could be the gallery hosted at nuget.org, a third-party gallery, or a local repository, but before that, you may want to test it locally. This you can achieve by creating a local package store.
To create the local package store, open the NuGet Package Manager Settings by navigating to the Visual Studio menu hierarchy, Tools | NuGet Package Manager | Package Manager Settings, as shown in the following screenshot:
From the left-hand navigation panel, navigate to NuGet Package Manager | Package Sources. On the right-hand panel, it lists all the available package sources and the machine-wide package sources. Click the 
icon to add a new package source:
This will provide you with a field to define the new package source. Give it a name and...