Advanced Generics & Constraints

🧠 Advanced C# Programming Guide: Expert-Level Concepts for Professional Developers

Welcome to the Advanced C# Tutorial, crafted for experienced developers looking to master the depths of the C# language. This guide focuses on sophisticated topics such as generics, reflection, advanced async programming, memory management, expression trees, and design patterns used in real-world enterprise systems.

By the end of this guide, you will be able to write highly scalable, maintainable, and performant C# applications, contribute to large codebases, and architect robust solutions.

🧬 1. Advanced Generics & Constraints

🔹 Generic Constraints

public class Repository<T> where T : class, IEntity, new()
{
    public T Create() => new T();
}

| Constraint         | Meaning                            |
|--------------------|-------------------------------------|
| `where T : class`  | T must be a reference type          |
| `where T : struct` | T must be a value type              |
| `where T : new()`  | T must have a parameterless constructor |
| `where T : BaseClass` | T must inherit from BaseClass   |