Google chart API in .NET

Yes I know - there are good .NET libraries for using google chart API, but I was interested to dig a little bit deeper into google chart API. And I have to say that google chart is worse than opensource program GNUPLOT (in the sense of functionality), but ok whatever... And second target was - to have as less code (including libraries) as possible for charting VERY simple XY graphs. So after studing a bit google chart documentation- I wrote very primitive class for plotting simple XY graph. For plotting graphs with this code you need:
- Internet connection
- .NET framework 3.5
- Internet browser (whatever you like)
So this is the code:

---

    class Program
    {
        static void Main(string[] args)
        {
            double[] xval;
            double[] ysin, yexp;

            xval = new double[] { 0, 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5 };
            ysin = Array.ConvertAll(xval, v => { return Math.Sin(v); }); 
            yexp = Array.ConvertAll(xval, v => { return Math.Exp(v); }); 
            
            GoogleChart.PlotLineChart(xval, ysin, "x values", "sin(x)", "sin(x) function", null);
            GoogleChart.PlotLineChart(xval, yexp, "x values", "exp(x)", "exp(x) function", null);
        }
    }

    class GoogleChart
    {
        public static void PlotLineChart(double[] Xvalues, 
                                        double[] Yvalues, 
                                        string Xlabel, 
                                        string Ylabel, 
                                        string Title, 
                                        string imgsize)
        {
            string urltemplate = "http://chart.apis.google.com/chart?cht=lxy&chs=@imgsize@&chd=t:@xvalues@%7C@yvalues@&chds=@xmin@,@xmax@,@ymin@,@ymax@&chxr=0,@xmin@,@xmax@%7C1,@ymin@,@ymax@&chxt=x,y,x,y&chxl=2:%7C@xlabel@%7C3:%7C@ylabel@%7C&chxp=2,50%7C3,50&chtt=@title@";
            string xvalagg = Xvalues.Aggregate("", (old, next) => 
                             old + ((old == "") ? "" : ",") + next.ToString(CultureInfo.InvariantCulture));
            string yvalagg = Yvalues.Aggregate("", (old, next) => 
                             old + ((old == "") ? "" : ",") + next.ToString(CultureInfo.InvariantCulture));

            if (imgsize == null) imgsize = "300x200";

            urltemplate = urltemplate.Replace("@imgsize@", imgsize);
            urltemplate = urltemplate.Replace("@xvalues@", xvalagg);
            urltemplate = urltemplate.Replace("@yvalues@", yvalagg);
            urltemplate = urltemplate.Replace("@xmin@", Xvalues.Min().ToString(CultureInfo.InvariantCulture));
            urltemplate = urltemplate.Replace("@xmax@", Xvalues.Max().ToString(CultureInfo.InvariantCulture));
            urltemplate = urltemplate.Replace("@ymin@", Yvalues.Min().ToString(CultureInfo.InvariantCulture));
            urltemplate = urltemplate.Replace("@ymax@", Yvalues.Max().ToString(CultureInfo.InvariantCulture));
            urltemplate = urltemplate.Replace("@xlabel@", Xlabel);
            urltemplate = urltemplate.Replace("@ylabel@", Ylabel);
            urltemplate = urltemplate.Replace("@title@", Title);

            System.Diagnostics.Process.Start(urltemplate);
        }
    }

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With this sample code there are generated these nice graphs:


This is it. Have fun with charting !