Expression Bodies

When to use => vs { return ...; }.

Rules

Member Type	Body Style	Enforced
Methods	Block body { }	Error
Constructors	Block body { }	Error
Operators	Block body { }	Error
Properties (get-only)	Expression body =>	Error
Indexers	Expression body =>	Error
Accessors (get/set one-liners)	Expression body =>	Error

Properties & Indexers — Use Expression Body

// GOOD
public int Health => _health;
public string Name => _name;
public Item this[int index] => _items[index];

// BAD
public int Health
{
    get { return _health; }
}

Methods — Use Block Body

// GOOD
public int GetHealth()
{
    return _health;
}

// BAD
public int GetHealth() => _health;

Why Block Body for Methods?

• Debugger breakpoints work on individual lines inside blocks
• Stack traces are clearer
• Adding logic later doesn't require restructuring
• Expression bodies hide complexity in one line