LABELS

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace WindowsFormsApp4
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            chart1.ChartAreas[0].AxisY.Maximum = 10;
            chart1.ChartAreas[0].AxisY.Interval = (10 / 10) * 2;
            chart1.ChartAreas[0].AxisY2.Maximum = 10;
            chart1.ChartAreas[0].AxisY2.Interval = (10 / 10) * 2;
            chart1.ChartAreas[0].AxisY2.LabelStyle.Enabled = false;
            chart1.ChartAreas[0].AxisY2.MajorGrid.Enabled = false;
        }

        private void Add_Click(object sender, EventArgs e)
        {
            chart1.Series[0].Points.AddXY(DateTime.Now.ToString("HH:mm:ss"), PointBox.Text.Replace(',','.'));

            if (Convert.ToDouble(PointBox.Text) > chart1.ChartAreas[0].AxisY.Maximum)
            {
                double tal = Math.Ceiling(Convert.ToDouble(PointBox.Text));
                chart1.ChartAreas[0].AxisY.Maximum = tal;
                chart1.ChartAreas[0].AxisY.Interval = (tal / 10) * 2;
                chart1.ChartAreas[0].AxisY2.Maximum = tal;
                chart1.ChartAreas[0].AxisY2.Interval = (tal / 10) * 2;

            }
        }

        private void LeakButton_Click(object sender, EventArgs e)
        {
            chart1.ChartAreas[0].AxisY2.LabelStyle.Enabled = true;
            chart1.ChartAreas[0].AxisY2.MajorGrid.Enabled = true;
            chart1.ChartAreas[0].AxisY2.CustomLabels.Clear();
            Double CustomOne = -1;
            Double CustomTwo = -1;

            try
            {
                CustomOne = Convert.ToDouble(LeakOne.Text);
            }

            catch (System.FormatException)
            {
            }

            try
            {
                CustomTwo = Convert.ToDouble(LeakTwo.Text);
            }

            catch (System.FormatException)
            {
            }

            CustomLabel Leak1 = new CustomLabel
            {
                FromPosition = CustomOne+0.5,
                ToPosition = CustomOne-0.5,
                ForeColor = Color.Green,
                Text = "Leak A",
                GridTicks = System.Windows.Forms.DataVisualization.Charting.GridTickTypes.Gridline
            };
            chart1.ChartAreas[0].AxisY2.CustomLabels.Add(Leak1);

            CustomLabel Leak2 = new CustomLabel
            {
                FromPosition = CustomTwo+0.5,
                ToPosition = CustomTwo-0.5,
                ForeColor = Color.Red,
                Text = "Leak B",
                GridTicks = System.Windows.Forms.DataVisualization.Charting.GridTickTypes.Gridline
            };

            chart1.ChartAreas[0].AxisY2.CustomLabels.Add(Leak2);



        }
    }
}