C# Graphics画有填充和无填充的形状

 /// <summary>
/// 画有填充色
/// </summary>
/// <param name="sender"></param>
/// <param name=""></param>
private void button1_Click(object sender, EventArgse)
{
    Graphics gra = this.pictureBox1.CreateGraphics();
    Pen bush = new Pen(Color.Green);//画笔的颜色
    gra.DrawEllipse(bush, 10, 10, 100, 100);//画椭圆的方法，x坐标、y坐标、宽、高，如果是100，则半径为50
}

/// <summary>
/// 画有填充色
/// </summary>
/// <param name="sender"></param>
/// <param name=""></param>
private void button1_Click(object sender, EventArgse)
{
    Graphics gra = this.pictureBox1.CreateGraphics();
    Brush bush = new SolidBrush(Color.Green);//填充的颜色
    gra.FillEllipse(bush, 10, 10, 100, 100);//画填充椭圆的方法，x坐标、y坐标、宽、高，如果是100，则半径为50
}