equivalent code for web applications

Question

using(Brush brush  = new SolidBrush(Color.Yellow))
{
    if (numNumbers == 0)
    numNumbers = 1;
    for (int i = 0; i < 360; i += 360 / numNumbers)
    {
        Matrix matrix = new Matrix();
        matrix.RotateAt(i + this.angle, centerPt);
        g.Transform = matrix;
        if(i >= redZone)
            g.DrawLine(Pens.Red,center, center,center, center * 3/10);
        else
            g.DrawLine(Pens.Yellow, center, center, center, center * 3/10);
        g.DrawString(((int)(i * divisor)).ToString(), 
            this.Font,brush, center - 6, center * 5 / 100,
            StringFormat.GenericTypographic);
    }
}

How to use the above code in web applications. please help me out as i am trying to generate gauge charts..