Developers and system administrators often face challenges like inefficient workflows, complex system operations, and the growing demand for robust automation tools. CLI applications provide a powerful solution by enhancing flexibility, efficiency, and productivity in various environments. This book will guide you through mastering the development of robust command-line tools using .NET. Written by a Microsoft Azure MVP, the book’s hands-on approach ensures practical experience with real-world projects. You’ll start with an overview of foundational principles, essential concepts, and best practices for CLI application development. From there, you’ll advance to creating interactive interfaces, integrating with external APIs and services, and implementing security measures to safeguard your applications. Each chapter will build progressively from basic to advanced topics. Beyond development, you’ll learn how to enhance application quality through testing, package for efficient distribution, and deploy effectively. The book also teaches strategies to optimize performance to ensure your applications run efficiently under heavy usage. By the end of this book, you’ll have gained a deep understanding of CLI application development with .NET to build modular, extensible, and easy-to-maintain applications.