protected void Calendar1_DayRender(object sender,

    DayRenderEventArgs e)

{

    // Display vacation dates in yellow boxes with purple borders.

    Style vacationStyle = new Style();

    vacationStyle.BackColor = System.Drawing.Color.Yellow;

    vacationStyle.BorderColor = System.Drawing.Color.Purple;

    vacationStyle.BorderWidth = 3;

    // Display weekend dates in green boxes.

    Style weekendStyle = new Style();

    weekendStyle.BackColor = System.Drawing.Color.Green;

    if ((e.Day.Date >= new DateTime(2000,11,23)) &&

        (e.Day.Date <= new DateTime(2000,11,30)))

    {

        // Apply the vacation style to the vacation dates.

        e.Cell.ApplyStyle(vacationStyle);

    }

    else if (e.Day.IsWeekend)

    {

        // Apply the weekend style to the weekend dates.

        e.Cell.ApplyStyle(weekendStyle);

    }
}

  protected void Calendar1_DayRender(object sender, System.Web.UI.WebControls.DayRenderEventArgs e)

        {

            if (e.Day.IsOtherMonth)

            {

                Style visible = new Style();

                visible.BackColor = System.Drawing.Color.White;

                visible.BorderColor = System.Drawing.Color.White;

                visible.ForeColor = Color.White;

                e.Day.IsSelectable = false;

                e.Cell.ApplyStyle(visible);

                return;

            }

}