.NET is a software framework developed by Microsoft. The .NET Framework has been around since 2002 and is mainly used on Windows platform.
However, to support the ability to run .NET on multiple operating systems, .NET Core was born. MVC, Entity Framework and Dependency Injection are just some of the popular features to migrate from the .NET Framework to .NET Core.
The introduction of the Nuget Gallery began when popularity in .NET grew. The Nuget Gallery is a free and open-source package manager for the Microsoft platform, and continues to provide plugins for Microsoft applications.