How do you implement the flyweight pattern?

Question

Accepted Answer

**Flyweight** — share common state.

**Implementation:**
```csharp
public class CharacterFlyweight
{
    private readonly char _symbol;
    private readonly Font _font;

public CharacterFlyweight(char symbol, Font font)
    {
        _symbol = symbol;
        _font = font;
    }

public void Draw(int x, int y) =>
        Console.WriteLine($"Draw {_symbol} at ({x},{y})");
}

public class FlyweightFactory
{
    private readonly Dictionary<char, CharacterFlyweight> _cache = new();

public CharacterFlyweight Get(char c)
    {
        if (!_cache.ContainsKey(c))
            _cache[c] = new CharacterFlyweight(c, new Font());
        return _cache[c];
    }
}
```

**Key:** Flyweight for memory optimization.

C#: How do you implement the flyweight pattern?