Bezier curve for the Microsoft Web Chart control

using System.Collections.Generic;
using System.Linq;
using System.Web.UI.DataVisualization.Charting;

namespace BezierCurve
{
	/*
	 * This class is a work of Rainer Halanek, Copyright 2011
	 * 
	 * It is licensed under the Code Project Open License (CPOL), see http://www.codeproject.com/info/cpol10.aspx
	 * 
	 * That grants you the following things:
	 *		Source Code and Executable Files can be used in commercial applications;
	 *		Source Code and Executable Files can be redistributed; and
	 *		Source Code can be modified to create derivative works.
	 *		No claim of suitability, guarantee, or any warranty whatsoever is provided. The software is provided "as-is".
	 *		The Article(s) accompanying the Work may not be distributed or republished without the Author's consent
	 *		
	 * I also use code from a CodeProject article by Tolga Birdal which is also licensed under the CPOL
	 * you can find his work here: http://www.codeproject.com/KB/recipes/BezirCurves.aspx
	 * 
	 * Please do not remove my copyright if you use that class!
	 * 
	 */

	/// <summary>
	/// You can use this Series like any other series in the MS web charting control
	/// </summary>
	public class BezierSeries : Series
	{
		#region fields

		private int _pointsOnCurve = 1000;
		private List<DataPoint> _bezierPoints = new List<DataPoint>();

		#endregion

		#region properties

		/// <summary>
		/// Defines how many points the resulting curve will have;
		/// min = 2, must eb an even number
		/// </summary>
		public int PointsOnCurve
		{
			get { return _pointsOnCurve; }
			set
			{
				//min value is 2
				if (value < 2)
				{
					value = 2;
				}

				//it must be an even number
				if (value % 2 == 1)
				{
					value++;
				}

				_pointsOnCurve = value;
			}
		}

		/// <summary>
		/// Points that should be used to calculate the bezier graph
		/// </summary>
		public List<DataPoint> BezierPoints
		{
			get
			{
				return _bezierPoints;
			}
			set
			{
				if (value != null)
				{
					_bezierPoints = value;

					List<double> ptList = new List<double>();

					//convert bezier points to flat list
					foreach (DataPoint point in value)
					{
						ptList.Add(point.XValue);
						ptList.Add(point.YValues[0]);
					}

					//bezier curve calculation			
					CalcBezierCurve bc = new CalcBezierCurve();
					double[] ptind = new double[ptList.Count];
					double[] p = new double[PointsOnCurve];
					ptList.CopyTo(ptind, 0);
					bc.Bezier2D(ptind, (PointsOnCurve) / 2, p);

					//bezier curve points
					this.ChartType = SeriesChartType.Line;

					for (int i = 0; i < p.Count(); i = i + 2)
					{
						this.Points.AddXY(p[i], p[i + 1]);
					}
				}
			}
		}

		#endregion
	}
}