Section 2: Code Fixing

11. Fix this method declaration:

public void PrintMessage {
    Console.WriteLine("Hello!");
}

Answer

public void PrintMessage() {
    Console.WriteLine("Hello!");
}

Added parenthesis after method name.

---

12. Fix this struct constructor issue:

struct Player {
    public string Name;
    public Player() {
        Name = "Default";
    }
}

Answer

struct Player {
    public string Name;
    public Player(string name) {
        Name = name;
    }
}

Structs cannot have parameterless constructors.

---

13. Fix this enum:

enum Difficulty {
    Easy = "Low",
    Medium = "Medium",
    Hard = "High"
}

Answer

enum Difficulty {
    Easy = 1,
    Medium = 2,
    Hard = 3
}

Enum values must be integers, not strings.

---

14. Fix this property declaration:

class Player {
    public string Name { get; }
    
    public Player(string name) {
        Name = name;
    }
}

Answer

class Player {
    public string Name { get; private set; }
    
    public Player(string name) {
        Name = name;
    }
}

Added private set; to allow assignment inside the constructor.

---

15. Fix this delegate declaration:

public delegate void MyDelegate { }

Answer

public delegate void MyDelegate();

Corrected delegate syntax.

---

16. Fix this incorrect loop:

for (int i = 0; i < 5; i++)
    Console.WriteLine(i)

Answer

for (int i = 0; i < 5; i++)
    Console.WriteLine(i);

Added missing semicolon.

---

17. Fix this incorrect try-catch block:

try {
    Console.WriteLine("Trying...");
}
catch {
    Console.WriteLine("An error occurred.");
}

Answer

try {
    Console.WriteLine("Trying...");
    throw new Exception("Error");
}
catch (Exception ex) {
    Console.WriteLine($"An error occurred: {ex.Message}");
}

Explicitly throwing and catching Exception.

---

18. Fix this static class issue:

public static class GameManager {
    public int score;
}

Answer

public static class GameManager {
    public static int score;
}

Static classes cannot have instance variables.

---

19. Fix this incorrect property setter:

class Player {
    public string Name { get; set; }
    public Player() {
        set Name = "John";
    }
}

Answer

class Player {
    public string Name { get; set; }
    public Player() {
        Name = "John";
    }
}

Removed incorrect set keyword in constructor.

---

20. Fix this incorrect event handling in Unity:

public event Action GameStarted;
GameStarted();

Answer

public event Action GameStarted;
GameStarted?.Invoke();

Used null-conditional operator to prevent null reference exceptions.