C# interface

interface IPoint
{
int Px
{
get; set;
}
int Py
{
get; set;
}
}

class ReversePoint : IPoint
{
int x;
int y;

public ReversePoint(int x, int y)
{
    this.x = x;
    this.y = y;
}

public int Px
{
    get { return -x; }
    set { x = value; }
}

// Implementing Py similarly to Px
public int Py
{
    get { return -y; } // Return the negative of y
    set { y = value; } // Set y directly
}

}

class MainClass
{
public static void DisplayPoint( IPoint point)
{
Console.WriteLine(“x={0},y={1}”, point.Px, point.Py);
}

static void Main()
{
    ReversePoint p1 = new ReversePoint(-12, -300);

    Console.WriteLine(p1.Px);
    Console.WriteLine(p1.Py);

    ReversePoint p2 = new ReversePoint(12, 300);

    //プロパティの参照
    DisplayPoint(p2);
}

}