Features of creating Android applications using Visual Studio Community in C # are considered. The book introduces the reader to the structure of Xamarin.Android projects, with the peculiarities of building and debugging applications. The main approaches to the development of Android applications, methods of building an interface, data storage are considered, integration of mobile applications with web services is shown, the features of distribution and publication of applications in the Google Play store are described, the main methods of monetizing mobile content are analyzed. There are numerous examples of code for solving various problems that can be used in your applications.