C# WinApp จะใช้ DrawString ยังไงให้ตัวหนังสือ ขยายออก แล้วก็ชิดขวา ด้วยครับ

 public static string SpacedString(string myOldString)
        {
            //ref
            //https://stackoverflow.com/questions/2969143/c-sharp-drawstring-letter-spacing

            System.Text.StringBuilder newStringBuilder = new System.Text.StringBuilder("");
            foreach (char c in myOldString.ToCharArray())
            {
                newStringBuilder.Append(c.ToString() + "  ");
            }

            string MyNewString = "";
            if (newStringBuilder.Length > 0)
            {
                // remember to trim off the last inserted space
                 MyNewString = newStringBuilder.ToString().Substring(0, newStringBuilder.Length - 1).Trim();
                //MyNewString = newStringBuilder.ToString();
            }
     
            // no else needed if the StringBuilder's length is <= 0... The resultant string would just be "", which is what it was intitialized to when declared.
            return MyNewString;
        }

public static void DrawNumPositive(this Graphics e,  Font fontDetail, int min, int max, int x, int y, string opr, int CountNum= 6)
        {

            
            var num = new Classed.Exten.RandomNumber(min, max);

  
            
            string _a = TextStringExtension.SpacedString(num.MinValue.ToString());
            string _b = TextStringExtension.SpacedString(num.MaxValue.ToString());

            System.Windows.Forms.MessageBox.Show(num.MinValue + "\n" + num.MaxValue + "\n" + _a + "\n" + _b);

            int w = Convert.ToInt32(e.MeasureString("0  ", fontDetail).Width);
            int h = Convert.ToInt32(e.MeasureString("0  ", fontDetail).Height);

            //https://docs.microsoft.com/en-us/dotnet/desktop/winforms/advanced/how-to-align-drawn-text?view=netframeworkdesktop-4.8
            StringFormat format = new StringFormat(StringFormatFlags.DirectionRightToLeft);

            // https://stackoverflow.com/questions/11451001/why-isnt-my-text-right-aligned-when-i-custom-draw-my-strings
            //https://docs.microsoft.com/en-us/dotnet/desktop/winforms/advanced/how-to-align-drawn-text?view=netframeworkdesktop-4.8&redirectedfrom=MSDN
            StringFormat stringFormat = new StringFormat() { Alignment = StringAlignment.Far} ;


            e.DrawString(_b, fontDetail, new SolidBrush(Color.Black), new Rectangle(x, y, w*CountNum, h), stringFormat);
            e.DrawString(_a, fontDetail, new SolidBrush(Color.Black), new Rectangle(x, y+h+10, w * CountNum, h), stringFormat);

            e.DrawString(opr, fontDetail, new SolidBrush(Color.Black), x + (CountNum ) * w, y + 10 + h / 2);
            e.DrawLine(new Pen(Color.Black, 3), x, y + h * 3 + 15, x + (CountNum) * w, y + h * 3 + 15);
            e.DrawLine(new Pen(Color.Black, 3), x, y + h * 3 + 20, x + (CountNum ) * w, y + h * 3 + 20);



        }

 Task.Factory.StartNew(() =>
            {

                //  RandomNumberGenerator.GetInt32(1, 10000)
                //  random.Next(1,1000000)
                int c = 0;
                for (int x = 1; x <= 1000; x++)
                {

                    richTextBox1.Invoke(new Action(() => richTextBox1.Text +="/" + RandomNumberGenerator.GetInt32(1, 1000000)));
                    if (c >= 15)
                    {
                        richTextBox1.Invoke(new Action(() => richTextBox1.Text += "\n"));
                        c= 0;
                    }

                    c++;
                }

               
       


           });