using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        bool hogehoge = true;
        private void button1_Click(object sender, EventArgs e)
        {
            Series series1 = new Series("y = x*x");
            Series series2 = new Series("y = 5*x+20");
            for (int x = 1; x < 10; x++)
            {
                series1.Points.AddXY(x, x * x);
                series2.Points.AddXY(x, 5 * x + 20);
            }
            {
                series1.Color = Color.Red;
                series1.MarkerSize = 15;
                series1.MarkerStyle = System.Windows.Forms.DataVisualization.Charting.MarkerStyle.Diamond;
                series1.IsValueShownAsLabel = true;
                series1.LabelForeColor = Color.Blue;
                series1.ChartType = SeriesChartType.Line; // グラフ形状
                if(hogehoge)  series1.BorderWidth = 10; //これで太さが変わる
            }
            {
                series2.Color = Color.Blue;
                series2.MarkerColor = Color.Blue;
                //series2.MarkerSize = 20;
                series2.MarkerStyle = System.Windows.Forms.DataVisualization.Charting.MarkerStyle.Circle;
                series2.ChartType = SeriesChartType.FastLine;
                if (hogehoge) series2.BorderWidth = 10; //これで太さが変わる
            }
            {
                chart1.Series.Clear();
                chart1.Series.Add(series1);
                chart1.Series.Add(series2);
                chart1.ChartAreas[0].BackColor = Color.LightCyan;
            }
            {
                Axis ax = chart1.ChartAreas[0].AxisX;
                ax.MajorGrid.LineColor = Color.LightGray;
                Axis ay = chart1.ChartAreas[0].AxisY;
                ay.MajorGrid.LineColor = Color.LightGray;
            }
            hogehoge = !hogehoge;
        }
    }
}