【C#】在窗口输出字符串

private void button1_Click(object sender, EventArgs e)
        {
              Graphics g = Graphics.FromHwnd(Handle);
              Font f = new Font("宋体", 34);
              Brush b;
              b = new SolidBrush(Color.Black);
              g.DrawString("aaaaaaaaaaaa",f,b,50,50);
              g.Dispose(); 
        }