using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;

namespace ConsoleApplication3
{
    class Program
    {
        static void Main(string[] args)
        {
            Double xStart = 0.25;
            Double yStart = 0.92;
            Double startAngle = 169.51;
            Double sweepAngle = 123.78;
            Double Rx = 0.436;
            Double Ry = 0.593;

            Double centerX = xStart - Rx * Math.Cos(startAngle * Math.PI / 180.0);
            Double centerY = yStart - Ry * Math.Sin(startAngle * Math.PI / 180.0);
            Double endAngle = startAngle + sweepAngle;
            Double xEnd = centerX + Rx * Math.Cos(endAngle * Math.PI / 180.0);
            Double yEnd = centerY + Ry * Math.Sin(endAngle * Math.PI / 180.0);

            Console.WriteLine("x end = {0}", xEnd);
            Console.WriteLine("y end = {0}", yEnd);

            String savePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "ellipse.png");
            CreateEllipseBitmap(centerX, centerY, Rx, Ry, 1000, savePath);

            Console.ReadKey();
        }

        private static void CreateEllipseBitmap(Double centerX, Double centerY, Double rx, Double ry, Int32 factor, String savePath)
        {
            Int32 bitmapWidth = (Int32)(factor * (centerX + rx)) + 10;
            Int32 bitmapHeight = (Int32)(factor * (centerY + ry)) + 10;

            Bitmap bitmap = new Bitmap(bitmapWidth, bitmapHeight);

            for (Double angle = 2 * Math.PI; angle > 0; angle -= 2 * Math.PI / 3600)
            {
                Int32 x = (Int32)( factor * (centerX + rx * Math.Cos(angle)) );
                Int32 y = (Int32)( factor * (centerY + ry * Math.Sin(angle)) );

                bitmap.SetPixel(x - 1, y, Color.Red);
                bitmap.SetPixel(x, y, Color.Red);
                bitmap.SetPixel(x + 1, y, Color.Red);
            }

            bitmap.Save(savePath, ImageFormat.Png);
        }
    }
}