Properties and Encapsulation

Private Fields

A private field stores data that only the class can change directly.

Private Fields

PrivateFields.cs 
using System;

class Score
{
    private int points;

    public int Points
    {
        get { return points; }
    }

    public void Add(int amount)
    {
        points += amount;
    }
}

class Program
{
    static void Main()
    {
        int bonus = ;
        Score score = new Score();
        score.Add(10);
        score.Add(bonus);

        Console.WriteLine($"bonus={bonus}");
        Console.WriteLine($"points={score.Points}");
    }
}

using System;

class Score
{
    private int points;

    public int Points
    {
        get { return points; }
    }

    public void Add(int amount)
    {
        points += amount;
    }
}

class Program
{
    static void Main()
    {
        int bonus = ;
        Score score = new Score();
        score.Add(10);
        score.Add(bonus);

        Console.WriteLine($"bonus={bonus}");
        Console.WriteLine($"points={score.Points}");
    }
}

using System;

class Score
{
    private int points;

    public int Points
    {
        get { return points; }
    }

    public void Add(int amount)
    {
        points += amount;
    }
}

class Program
{
    static void Main()
    {
        int bonus = ;
        Score score = new Score();
        score.Add(10);
        score.Add(bonus);

        Console.WriteLine($"bonus={bonus}");
        Console.WriteLine($"points={score.Points}");
    }
}
private field A private field hides storage behind public methods or properties.