ASP.NET Core has a great code-sharing feature where you can easily share classes, functions and more between projects and thus save time in development. Check out this blog post on how to do this via NuGet packages and DLL files.
A world of possibilities—ASP.NET Core is one of the many features that make up .NET. Check out this first post of the “ASP.NET Core Basics” series for an overview of all the possibilities available in ASP.NET Core.