public new object Clone()
        {
            CEntityLine entity;

            entity = new CEntityLine();

            CloneEntity(entity);

            return(entity);
        }
        private void BuildSquareList()
        {
            List <CEntityLine> lineList = new List <CEntityLine>();

            foreach (object obj in EntityList)
            {
                if (obj is CEntityLine)
                {
                    CEntityLine line = obj as CEntityLine;
                    if (line != null)
                    {
                        lineList.Add(line);
                    }
                }
            }

            foreach (CEntityLine line1 in lineList)
            {
                foreach (CEntityLine line2 in lineList)
                {
                    if (line2.Y0 == line1.Y1 && line2.X0 == line1.X1)
                    {
                        foreach (CEntityLine line3 in lineList)
                        {
                            if (line3.Y0 == line2.Y1 && line3.X0 == line2.X1)
                            {
                                foreach (CEntityLine line4 in lineList)
                                {
                                    if (line4.Y0 == line3.Y1 && line4.X0 == line3.X1)
                                    {
                                        //this would mark a parallagram or trapezoid as a rectangle. Needs modified for angles.
                                        //if (line1.Length == line2.Length && line1.Length == line3.Length && line1.Length == line4.Length)
                                        //{
                                        double smallestX0 = line1.X0;
                                        if (line2.X0 < smallestX0)
                                        {
                                            smallestX0 = line2.X0;
                                        }
                                        if (line3.X0 < smallestX0)
                                        {
                                            smallestX0 = line3.X0;
                                        }
                                        if (line4.X0 < smallestX0)
                                        {
                                            smallestX0 = line4.X0;
                                        }
                                        double smallestY0 = line1.Y0;
                                        if (line2.Y0 < smallestY0)
                                        {
                                            smallestY0 = line2.Y0;
                                        }
                                        if (line3.Y0 < smallestY0)
                                        {
                                            smallestY0 = line3.Y0;
                                        }
                                        if (line4.Y0 < smallestY0)
                                        {
                                            smallestY0 = line4.Y0;
                                        }
                                        double largestX1 = line1.X1;
                                        if (line2.X1 > largestX1)
                                        {
                                            largestX1 = line2.X1;
                                        }
                                        if (line3.X1 > largestX1)
                                        {
                                            largestX1 = line3.X1;
                                        }
                                        if (line4.X1 > largestX1)
                                        {
                                            largestX1 = line4.X1;
                                        }
                                        double largestY1 = line1.Y1;
                                        if (line2.Y1 > largestY1)
                                        {
                                            largestY1 = line2.Y1;
                                        }
                                        if (line3.Y1 > largestY1)
                                        {
                                            largestY1 = line3.Y1;
                                        }
                                        if (line4.Y1 > largestY1)
                                        {
                                            largestY1 = line4.Y1;
                                        }
                                        if (!line1.PartOfComplexShape && !line2.PartOfComplexShape && !line3.PartOfComplexShape && !line4.PartOfComplexShape)
                                        {
                                            CEntityRectangle square = new CEntityRectangle();
                                            square.Width  = Math.Round(largestX1 - smallestX0, 3);
                                            square.Height = Math.Round(largestY1 - smallestY0, 3);
                                            square.CenterPoint_Horizontal = Math.Round(smallestX0 + (square.Width / 2), 3);
                                            square.CenterPoint_Vertical   = Math.Round(smallestY0 + (square.Height / 2), 3);
                                            bool alreadyHave = false;
                                            foreach (object obj in m_SquaresList)
                                            {
                                                CEntityRectangle rect = obj as CEntityRectangle;
                                                if (rect.CenterPoint_Horizontal == square.CenterPoint_Horizontal &&
                                                    rect.CenterPoint_Vertical == square.CenterPoint_Vertical &&
                                                    rect.Width == square.Width)
                                                {
                                                    alreadyHave = true;
                                                    break;
                                                }
                                            }
                                            if (!alreadyHave)
                                            {
                                                if (square.Width == square.Height)
                                                {
                                                    m_SquaresList.Add(square);
                                                }
                                                else
                                                {
                                                    m_RectanglesList.Add(square);
                                                }
                                            }
                                        }
                                        //}
                                    }
                                }
                            }
                        }
                    }
                }
            }
            m_SquareListBuilt = true;
        }