public double CalculateLength()
{
/*
* if (startPoint is MyPoint3D)
* {
* MyPoint3D startPointz = (MyPoint3D)startPoint;
* MyPoint3D stopPointz = (MyPoint3D)stopPoint;
*
* //return Math.Sqrt(Math.Pow(startPointz.x - stopPointz.x, 2) + Math.Pow(startPointz.y - stopPointz.y, 2) + Math.Pow(startPointz.z - stopPointz.z, 2));
* return startPointz.GetDistanceFromPoint(stopPointz);
* }
*
* //return Math.Sqrt(Math.Pow(startPoint.x - stopPoint.x, 2) + Math.Pow(startPoint.y - stopPoint.y, 2));
* return startPoint.GetDistanceFromPoint(stopPoint);
*/
return(startPoint.GetDistanceFromPoint(stopPoint));
}