Eğer GDI+ kullanarak bir metni tam olarak hizalamak isterseniz,

Graphics g = panel1.CreateGraphics();
g.FillRectangle(new LinearGradientBrush(panel1.ClientRectangle, Color.WhiteSmoke, Color.SkyBlue, 90), panel1.ClientRectangle);
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
g.DrawString("center", new Font("verdana", 12, FontStyle.Bold), Brushes.Maroon, panel1.ClientRectangle, sf);