C# (.NET) Application Security: From Vulnerabilities to Protection

In today's world of cyber threats, software security is no longer an option — it is a mandatory requirement. The book "C# (.NET) Application Security" is a practical guide that will help developers of any level turn their projects from vulnerable to protected. You will learn how hackers attack typical .NET applications and, most importantly, how to avoid it.

The book is built on the "from simple to complex" principle and covers the full Secure Software Development Life Cycle (SSDLC). Each chapter contains real examples of vulnerable C# code, methods of exploitation, and most importantly — detailed remediation techniques using built-in .NET capabilities and third-party libraries.

What you will learn:

• OWASP Top 10 for .NET: break down each critical vulnerability — SQL injection, Cross-Site Scripting (XSS), insecure deserialization, and Cross-Site Request Forgery (CSRF).
• Secure data handling: learn to properly use Entity Framework, parameterized queries, and stored procedures to protect against injections.
• Cryptography in .NET: master working with the System.Security.Cryptography namespace: password hashing (bcrypt, PBKDF2), symmetric and asymmetric encryption, digital signatures.
• Web application protection: configuring HTTPS, input validation, Content Security Policy (CSP), cookie protection, and session management in ASP.NET Core.
• API and microservice security: JWT tokens, OAuth 2.0, OpenID Connect, Rate Limiting.
• Audit and monitoring: implementing security logging, working with ETW (Event Tracing for Windows), and static code analysis tools (Roslyn Analyzers, SonarQube).

Who this book is for:

• C# developers (Junior, Middle, Senior) who want to write secure code from the start.
• DevOps engineers responsible for secure configuration of .NET environments.
• Software architects designing secure enterprise systems.
• Students and beginner programmers looking to master one of the most in-demand specializations.

The book contains over 50 ready-made code examples, checklists for code review, and practical exercises to reinforce the material. After reading it, you will be able to confidently pass security audits, implement best practices, and protect applications from the most common attacks. This is a must-have reference for anyone writing C# and caring about their product's reputation.