Secure HTTPS Certificate Validation in .NET

Establishing secure HTTPS connections in client-server applications requires a solid understanding of SSL/TLS certificate validation. When working with custom or self-signed certificates in .NET, default validation often fails, leaving developers struggling to balance security with functionality. This text-based course guides you through the fundamentals of certificate validation in C# and .NET. You will learn how to inspect certificate chains, implement secure custom validation logic, and handle self-signed certificates safely without compromising your application's security posture. What you'll learn: - Understand the core concepts of SSL/TLS handshakes, certificate chains, and trust stores - Configure HttpClient to establish secure connections with custom validation rules - Handle self-signed certificates safely during development and testing phases - Implement custom validation delegates using modern .NET SocketsHttpHandler APIs - Learn the risks of bypassing certificate validation and how to avoid common security pitfalls - Explore modern certificate pinning techniques to protect your application from transport-layer threats The course begins with essential security terminology and the mechanics of the TLS handshake. From there, you will progress to practical C# code implementations, exploring how to customize validation behavior in modern .NET applications while maintaining strict security standards. This course is designed for beginner to intermediate .NET developers who want to secure their client-server communication. No advanced cryptography experience is required, though basic familiarity with C# and HTTP requests is helpful. Start reading today to build secure, resilient, and trust-worthy network connections in your .NET applications.