//Visual Basic 2010 Containment Object Oriented Programming
public class PointAndLineTestFixtures {
    void Main() {
        this.PointTestFixture();
        this.LineTextFixture();
        Console.ReadLine();
    }
    void PointTestFixture() {
        Point point1 = new Point();
        Console.WriteLine((point1.X == 0));
        Console.WriteLine((point1.Y == 0));
        point1.X = 1;
        Console.WriteLine((point1.X == 1));
        Console.WriteLine((point1.Y == 0));
        point1.Y = 3;
        Console.WriteLine((point1.X == 1));
        Console.WriteLine((point1.Y == 3));
    }
    void LineTextFixture() {
        Line line1 = new Line();
        Console.WriteLine((line1.StartPoint == null));
        Console.WriteLine((line1.EndPoint == null));
        Console.WriteLine((line1.Length == 0));
        Point startPoint = new Point();
    }
}
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