Resizing images without loss of quality in ASP.NET

 Resize image without loss of it original quality. Here i'm resizing a big image to (410,90).

    private void MakeLarge()
    {
        System.Drawing.Image myThumbnail150;
        object obj = new object();
        obj = fuPhoto;
        System.Drawing.Image.GetThumbnailImageAbort myCallback = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
        HtmlInputFile hFile = (HtmlInputFile)obj;
        if (hFile.PostedFile != null && hFile.PostedFile.ContentLength > 0)
        {
            //this code used to remove some symbols between image name and replace with space
            string imgname1 = hFile.PostedFile.FileName.Replace('%', ' ').Substring(hFile.PostedFile.FileName.LastIndexOf("\\") + 1);
            string imgname2 = imgname1.Replace('#', ' ').Substring(imgname1.LastIndexOf("\\") + 1);
            string imgname3 = imgname2.Replace('@', ' ').Substring(imgname1.LastIndexOf("\\") + 1);
            string imgname4 = imgname3.Replace(',', ' ').Substring(imgname1.LastIndexOf("\\") + 1);
            string imgname5 = imgname4.Replace('&', ' ').Substring(imgname1.LastIndexOf("\\") + 1);

            Finalimagename = imgname5.ToString();

            string imgname = hFile.PostedFile.FileName.Substring(hFile.PostedFile.FileName.LastIndexOf("\\") + 1);
            string sExtension = imgname.Substring(imgname.LastIndexOf(".") + 1);

            //this code is used to check image extension
            if (sExtension.ToLower() == "jpg" || sExtension.ToLower() == "gif" || sExtension.ToLower() == "bmp" || sExtension.ToLower() == "jpeg")
            {

                hFile.PostedFile.SaveAs(ResolveUrl(Server.MapPath("~/Product_Photo_Large/" + Finalimagename)));
                //imgOriginal = "Product_Photo_Large\\" + Finalimagename;
                System.Drawing.Image imagesize = System.Drawing.Image.FromFile(Server.MapPath("~/Product_Large\\" + fuPhoto.PostedFile.FileName));
                Bitmap bitmapNew = new Bitmap(imagesize);

                if (imagesize.Width < imagesize.Height)
                {

                    myThumbnail150 = bitmapNew.GetThumbnailImage(390 * imagesize.Width / imagesize.Height, 390, myCallback, IntPtr.Zero);
                    // myLarge = bitmapNew.GetThumbnailImage(410, 310, myCallback, IntPtr.Zero);
                }
                else if (imagesize.Width > imagesize.Height)
                {
                    myThumbnail150 = bitmapNew.GetThumbnailImage(410, 410 * imagesize.Height / imagesize.Width, myCallback, IntPtr.Zero);
                    // myLarge = bitmapNew.GetThumbnailImage(410, 310, myCallback, IntPtr.Zero);
                }
                else
                {
                    myThumbnail150 = bitmapNew.GetThumbnailImage(410, 390, myCallback, IntPtr.Zero);
                }

                //Create a new directory name ThumbnailImage
                //Directory.CreateDirectory(Server.MapPath("ThumbnailImage"));
                //Save image in TumbnailImage folder
                myThumbnail150.Save(ResolveUrl(Server.MapPath("~/Resize\\")) + Finalimagename, System.Drawing.Imaging.ImageFormat.Jpeg);
                imgOriginal = "Resize\\" + Finalimagename;
                // MessageLabel.Text = "Successfully uploaded";


            }
            else
            {
                // lblError1.Visible = true;
                //lblError1.Text = "Check image extension";
            }
        }
    }