The Selenium C# tutorial focuses on managing alert windows in web applications using the Selenium test automation framework. It explores various types of alerts, such as simple alerts for warnings, confirmation alerts needing user permission, and prompt alerts requiring user input. The tutorial details operations like accepting, dismissing, and sending text inputs to these alerts using methods like SwitchTo(), Accept(), Dismiss(), and SendKeys(). It provides practical examples using NUnit test cases to demonstrate handling different alert types, including authentication alerts that require credentials. The tutorial emphasizes the integration of user credentials directly into URLs for authentication alerts, showcasing the use of test automation on a sample website with basic authentication. The article concludes with a brief overview of other related topics in the Selenium C# tutorial series, encouraging readers to explore further modules and provide feedback for collaborative learning.