In the fast-evolving landscape of mobile app development, Xamarin has emerged as a powerful tool that allows developers to create cross-platform applications using C#. By leveraging Xamarin, developers can write code once and deploy it across multiple platforms, including iOS and Android, without compromising on performance or user experience. In this article, we will provide an introductory guide to Xamarin development using C#, covering key aspects such as setting up the development environment, understanding the basics of C# programming language, building mobile apps, designing user interfaces, accessing native features, and implementing debugging and testing strategies.