SC>point = PointD.Empty;
SC>

public struct PointD
{
    public static readonly PointD Empty = new PointD();
    public Double X, Y;

    public PointD(Double x, Double y)
    {
        X = x;
        Y = y;    
    }
    public bool IsEmpty
    {
        get
        {
            return (X == 0 && Y == 0);
        }
    }    
}