JavaScript has become a crucial component of web development, enabling dynamic and interactive user experiences. Introduced in 1995, the language has evolved significantly over the years and can be executed in different runtime environments, including the browser and Node.js. Understanding these environments is essential for building effective JavaScript applications.

Apply the skills you've learned to develop a secure web application that meets strict security requirements and guidelines. This project will test your ability to design and implement secure authentication and authorization, data encryption, input validation, and error handling. Receive guidance on best practices and resources to help you successfully complete the project.

Learn how to create a C# program with custom exception handling and logging errors, understanding how to define custom exceptions, handle exceptions using try-catch blocks, and log errors to a file. Implementing these features properly involves following best practices such as using meaningful error messages and logging errors to track issues.