public Rectangle(ICellPosition upperLeft, IObjectSize size)
{
UpperLeft = upperLeft;
Size = size;
LowerRight = upperLeft.Add(Size.Subtract(new ObjectSize(1, 1)));
}
public static ICellPosition ToGlobalCoordinates(this ICellPosition relativeCoordinates, ICellPosition originCoordinates)
{
return(relativeCoordinates.Add(originCoordinates.Subtract(new CellPosition(1, 1))));
}