.Net Developer Journey - Day 9: Exception vs Error in C# | T–C–F, Result Pattern & .NET Reliability

Описание: Welcome to Day 9 (Part B) of my journey to becoming a professional .NET Developer 🚀

In this video, I go deeper into exception handling and error handling in C#, focusing on how to design reliable and maintainable .NET systems without abusing exceptions.

I start by clearly defining:

What errors, exceptions, and exceptional conditions mean

How .NET handles exceptions internally using try, catch, and finally

From there, I explore best practices and real-world design considerations, especially in layered architectures.

📌 What this session covers:

🔹 Exception vs Error

What makes a situation truly exceptional

Expected vs unexpected failures

🔹 try / catch / finally in .NET

What belongs in the try block

How catch should handle and translate failures

Why finally always executes

🔹 Performance & Exception Cost

Why exceptions are expensive

Using safer alternatives like int.TryParse, double.TryParse

🔹 Exception Boundaries

Where exceptions should be thrown

Where exceptions should NOT be thrown

Avoiding exception abuse across the application

🔹 Domain & Invariants

What invariants are

Constructor invariants and defensive object creation

Why throwing exceptions in the domain is often a design smell

🔹 Result-Based Error Handling

Using result/operation outcome patterns instead of exceptions

Returning success/failure explicitly

Applying this approach in my Simple Banking Application

🔹 Practical Demonstration

Applying error handling strategies in a real .NET project

Cleaner domain logic, fewer exceptions, better reliability

💡 Key takeaway:
Exceptions are not control flow. Reliable .NET systems use exceptions sparingly and intentionally.

This video is part of my daily training series where I document my growth toward becoming an employable .NET developer, focusing on C#, SOLID principles, clean architecture, and system reliability.

👉 If you’re learning C#, improving your fundamentals, or designing real-world .NET applications, subscribe and follow along.

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