Programming in .NET and C#. The course follows the course ICS, in which the basics of working with the C# language and the development of desktop applications are taught. IW5 focuses on other areas of development in C#, especially web development. The main content of the first part of the course and the project is the development of a web application, which consists of a server side, where the course focuses on development using the REST API using ASP.NET Core, Swagger, Open API. It then moves to the side of the web application that uses the created API and continues to work with Blazor technology. Furthermore, the course focuses on the automation of testing and deployment of web applications. In the second part of the semester, the course focuses on examples of other areas of development in C#, such as the development of mobile applications, games, alternative web frameworks, or advanced topics related to application architecture.