C#•8mo ago

Why does the following prints "Point" to the console instead of "(2, 3)"?

Point thing = new Point(2, 3);
System.Console.WriteLine(thing); // prints Point
System.Console.WriteLine(thing.ToString()); // prints (2, 3)

public class Point
{
    public int X {get; private set; }
    public int Y {get; private set; }

    public Point(): this(0, 0)
    {

    }

    public Point(int x, int y)
    {
        this.X = x;
        this.Y = y;
    }

    // using NEW not OVERRIDE
    public new string ToString()
    {
        return $"({X}, {Y})";
    }
}

Point thing = new Point(2, 3);
System.Console.WriteLine(thing); // prints Point
System.Console.WriteLine(thing.ToString()); // prints (2, 3)

public class Point
{
    public int X {get; private set; }
    public int Y {get; private set; }

    public Point(): this(0, 0)
    {

    }

    public Point(int x, int y)
    {
        this.X = x;
        this.Y = y;
    }

    // using NEW not OVERRIDE
    public new string ToString()
    {
        return $"({X}, {Y})";
    }
}

Is it because Console.WriteLine uses an object reference internally?

2 Replies

Angius•8mo ago

Yes, Console.WriteLine() takes an object So you need to override the object's .ToString() method Rather than hiding it with new

Sonath•8mo ago

alright thank you 😄 it really threw me off cause I always believed that it just executes whatever .ToString exists on the object that's passed, but since it's using object internally it makes sense!

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Why does the following prints "Point" to the console instead of "(2, 3)"?