static void Main()
{
Point3D a = new Point3D(5, 12, 34);
Point3D b = new Point3D(23, 44, -1);
double distance = Calculator.EuclideanDistanceBetweenPoints(a, b);
Console.WriteLine(distance);
}
public static double EuclideanDistanceBetweenPoints(Point3D a, Point3D b)
{
double distance = Math.Sqrt((a.X - b.X) * (a.X - b.X) + (a.Y - b.Y) * (a.Y - b.Y) + (a.Z - b.Z) * (a.Z - b.Z));
return distance;
}