This final paper will explain more about programming the application in Visual Studio. The purpose of the paper is to explain the web application for guest lectures, using Object Oriented Programming (C #), and point to the advantages, disadvantages and opportunities for improving the application. The paper consists of a theoretical and practical part. To understand the basics, in theoretical part will first be explained object oriented programming, then object-oriented programming languages and C # programming language as part of those languages. In the next part the Visual Studio, its use in business, and the difference between different versions of Visual Studio will also be explained. After the theoretical part, in the Methodology chapter, the methods used to create the application and to collect information were introduced. In the practical part, the composition of the application is explained. Models, controllers and views are explained and the code is displayed. Additionally, the application interface is displayed to get an insight into how models, controllers, and views work. After the practical part, in Chapter 3 - the Discussion, the options of application, benefits and defects of the application, and suggestions for improvement will be introduced. This final work can be useful to students as well as people who are first encountered with programming. It explains the appearance and purpose of making applications for different purposes. The application for guest lectures can greatly facilitate access to information on specific lectures and is created for that purpose.