This document provides an overview of ASP.NET Core and Swagger. It discusses what ASP.NET Core is, including that it is a cross-platform and open-source framework. It also describes some common ASP.NET Core components like MVC Core, Entity Framework Core, and Razor Pages. Additionally, it covers the evolution of ASP.NET technologies over time. Finally, it defines what Swagger is and compares it to Postman, then demonstrates how to get started with Swagger in an ASP.NET Core project.