สอบถามเรื่องการจัดตำแหน่งข้อความหน่อย e.Graphics.DrawString c#

string text1 = "Use StringFormat and Rectangle objects to" 
    + " center text in a rectangle.";
using (Font font1 = new Font("Arial", 12, FontStyle.Bold, GraphicsUnit.Point))
{
    Rectangle rect1 = new Rectangle(10, 10, 130, 140);

    // Create a StringFormat object with the each line of text, and the block
    // of text centered on the page.
    StringFormat stringFormat = new StringFormat();
    stringFormat.Alignment = StringAlignment.Center;
    stringFormat.LineAlignment = StringAlignment.Center;

    // Draw the text and the surrounding rectangle.
    e.Graphics.DrawString(text1, font1, Brushes.Blue, rect1, stringFormat);
    e.Graphics.DrawRectangle(Pens.Black, rect1);
}