What is a NuGet package and how do you use it in a .NET Core project?

A NuGet package is a software package that contains code, binaries, and other assets that can be easily consumed and integrated into .NET Core projects. NuGet packages are essentially a way to share and distribute reusable code across different .NET projects.

To use a NuGet package in a .NET Core project, you can use the NuGet Package Manager built into Visual Studio or the dotnet CLI command line tool. The NuGet Package Manager allows you to search for and install packages from the NuGet Gallery, a public repository of open source packages.

Once you've installed a package, you can add a reference to it in your project's code. This makes the package's classes, methods, and other components available for use in your project. You can also configure the package by setting its properties, adding additional dependencies, or customizing its behavior.

NuGet packages are a powerful tool for developers, allowing them to easily incorporate existing code and functionality into their projects, rather than having to reinvent the wheel for every new project.