Design Patterns - a convenient programming technique for solving routine software development tasks. Competent use of patterns allows you to achieve compliance with any requirements and reduce costs. This book describes effective ways to use C # -specific design patterns and the .NET Core platform. In addition to the familiar design patterns from Gangs of Four, you will learn the basics of object-oriented programming and SOLID principles. Then you will learn about the functional, reactive and competitive patterns with which you will work with streams and corutins. The final part contains patterns for working with microservice, serverless and cloud-oriented applications. You will also learn how to choose an architecture, such as microservice or MVC.