C# & .NET 8 Architect Mastery
1. Memory Management & Performance
The CLR Deep Dive: Stack, Heap, and Garbage Collection (GC) Value Types vs Reference Types: Structs, Records, and Classes Span<T> and Memory<T>: Zero-copy high-performance code Benchmarking with Benchmark.DotNet: Measuring nano-seconds
2. Advanced Asynchronous Programming
Async/Await Internals: The State Machine and TaskContext ValueTask vs Task: Avoiding allocation in hot paths Task.WhenAll vs Parallel.ForEachAsync: Concurrency at scale Thread Safety & Multi-threading: Locks, Semaphores, and Interlocked
3. Modern C# 12+ Features
Primary Constructors & Collection Expressions Pattern Matching: Switch expressions and Recursive patterns Required Members & Init-Only properties Native AOT (Ahead of Time): Deployment for serverless/edge
4. Enterprise Design Patterns in .NET
Dependency Injection (DI): Lifetime management and Captive Dependencies The Options Pattern: Type-safe configuration management The Factory & Builder Patterns in Modern .NET Middleware Architecture: Building custom ASP.NET Core pipelines
5. Dynamic Programming & Reflection
Reflection & Attributes: Building custom frameworks Expression Trees: Building dynamic LINQ queries Source Generators: Compile-time code generation for speed Dynamic Types & ExpandoObject: When and when not to use them
6. Testing & Quality Architecture
Unit Testing Patterns: xUnit, Moq, and FluentAssertions Integration Testing with WebApplicationFactory Mutation Testing: Testing the quality of your tests TDD (Test Driven Development) for Senior Architects
7. Modern Web API Architectures
Minimal APIs vs Controllers: Choice of architecture Rate Limiting & Throttling in ASP.NET Core Versioning Strategies: URL vs Header vs Media Type Real-time Web with SignalR and WebSockets
8. FAANG .NET Architect Interview
Case Study: Designing a High-Throughput Payment Gateway in .NET Case Study: Solving Memory Leaks and CPU Spikes in Production
C# & .NET 8 Architect Mastery

TDD (Test Driven Development) for Senior Architects

1 Views Updated 5/4/2026

Architectural TDD

Test-Driven Development is not about testing; it is about Design. It forces you to think about the 'API' of your class from the perspective of the user before you write a single line of implementation.

1. The Red-Green-Refactor Loop

  1. Red: Write a test for a feature that doesn't exist. It fails.
  2. Green: Write the minimum code to make it pass.
  3. Refactor: Clean up the code, remove duplication, and optimize.

2. Why Architects love TDD

TDD naturally leads to **Decoupled Code**. If you write the test first, you are forced to make the class 'Easy to instantiate.' This automatically fixes problems like hidden global dependencies and hard-coded 'new' statements.

4. Interview Mastery

Q: "When is TDD NOT appropriate?"

Architect Answer: "TDD is difficult when the requirements are extremely fluid and you are 'Exploring' the solution. It is also overkill for trivial code (like basic POCO classes or simple UI views). I use TDD for **Core Business Logic**, **Complex Algorithms**, and **Public APIs** where the cost of a mistake is high and the 'API' needs to be perfect."

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C# & .NET 8 Architect Mastery
1. Memory Management & Performance
The CLR Deep Dive: Stack, Heap, and Garbage Collection (GC) Value Types vs Reference Types: Structs, Records, and Classes Span<T> and Memory<T>: Zero-copy high-performance code Benchmarking with Benchmark.DotNet: Measuring nano-seconds
2. Advanced Asynchronous Programming
Async/Await Internals: The State Machine and TaskContext ValueTask vs Task: Avoiding allocation in hot paths Task.WhenAll vs Parallel.ForEachAsync: Concurrency at scale Thread Safety & Multi-threading: Locks, Semaphores, and Interlocked
3. Modern C# 12+ Features
Primary Constructors & Collection Expressions Pattern Matching: Switch expressions and Recursive patterns Required Members & Init-Only properties Native AOT (Ahead of Time): Deployment for serverless/edge
4. Enterprise Design Patterns in .NET
Dependency Injection (DI): Lifetime management and Captive Dependencies The Options Pattern: Type-safe configuration management The Factory & Builder Patterns in Modern .NET Middleware Architecture: Building custom ASP.NET Core pipelines
5. Dynamic Programming & Reflection
Reflection & Attributes: Building custom frameworks Expression Trees: Building dynamic LINQ queries Source Generators: Compile-time code generation for speed Dynamic Types & ExpandoObject: When and when not to use them
6. Testing & Quality Architecture
Unit Testing Patterns: xUnit, Moq, and FluentAssertions Integration Testing with WebApplicationFactory Mutation Testing: Testing the quality of your tests TDD (Test Driven Development) for Senior Architects
7. Modern Web API Architectures
Minimal APIs vs Controllers: Choice of architecture Rate Limiting & Throttling in ASP.NET Core Versioning Strategies: URL vs Header vs Media Type Real-time Web with SignalR and WebSockets
8. FAANG .NET Architect Interview
Case Study: Designing a High-Throughput Payment Gateway in .NET Case Study: Solving Memory Leaks and CPU Spikes in Production