[Solved] Examine the code below:class Wallet { private decimal amount; public void SetAmount(decimal value) { amount = value;... } }What is the main problem with this code? | C Sharp (C#)

C Sharp (C#) - Properties and Encapsulation

Examine the code below:

class Wallet {
  private decimal amount;
  public void SetAmount(decimal value) {
    amount = value;
  }
}
class Program {
  static void Main() {
    Wallet w = new Wallet();
    w.amount = 500m;
  }
}

What is the main problem with this code?

ADecimal type cannot be used for amount

BMethod SetAmount has wrong parameter type

CClass Wallet should be static

DCannot access private field 'amount' directly outside the class

Step-by-Step Solution

Solution:

Step 1: Identify access modifiers
The field amount is declared private, so it cannot be accessed outside Wallet.
Step 2: Check usage in Main()
Attempting w.amount = 500m; violates encapsulation and causes a compile error.
Final Answer:
Cannot access private field 'amount' directly outside the class -> Option D
Quick Check:
Private fields are inaccessible outside their class [OK]

Quick Trick: Private fields inaccessible outside class [OK]

Common Mistakes:

MISTAKES

Assuming private fields can be accessed directly
Confusing method parameter types
Thinking class must be static

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More C Sharp (C#) Quizzes

Examine the code below:

Step 1: Identify access modifiers

Step 2: Check usage in Main()

Final Answer:

Quick Check:

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