public double Calculate()
{
if (description.UpSpine == null || description.DownSpine == null || description.storage == null)
{
throw new ArgumentNullException("Fill all properties");
}
if (!description.storage.ContainDescription(description.UpSpine) || !description.storage.ContainDescription(description.DownSpine))
{
throw new ArgumentException("Spine not in storage");
}
var upspine = description.storage.GetDescription(description.UpSpine);
var downspine = description.storage.GetDescription(description.DownSpine);
var up_point = upspine.DownLeft;
var down_point = downspine.UpLeft;
var dist = GeometryHelper.Distance(new PointF(up_point.X,
up_point.Y),
new PointF(down_point.X,
down_point.Y));
LeftSide.Description = description;
var d1 = LeftSide.Calculate();
return((float)Math.Sqrt(dist * dist + d1 * d1));
}