Encapsulation Example in C#

This example shows how private fields are protected and accessed only through public methods (getters/setters):

public class BankAccount
{
    // Private field: cannot be accessed directly from outside the class
    private decimal balance;

    // Public method to deposit money (with controlled access)
    public void Deposit(decimal amount)
    {
        if (amount > 0)
        {
            balance += amount;
        }
    }

    // Public method to withdraw money (example of validation)
    public void Withdraw(decimal amount)
    {
        if (amount > 0 && amount <= balance)
        {
            balance -= amount;
        }
    }

    // Public getter for balance (read-only access)
    public decimal GetBalance()
    {
        return balance;
    }
}

// Usage example:
var account = new BankAccount();
account.Deposit(100);
account.Withdraw(40);
Console.WriteLine(account.GetBalance()); // Output: 60

This demonstrates encapsulation because the balance field is hidden from direct access, and all interactions with it go through controlled methods.