Inital implementation

Pinger.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 16
+VisualStudioVersion = 16.0.30717.126
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Pinger", "Pinger\Pinger.csproj", "{D316826F-4850-4869-9071-CCEF16AD94C3}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{D316826F-4850-4869-9071-CCEF16AD94C3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D316826F-4850-4869-9071-CCEF16AD94C3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D316826F-4850-4869-9071-CCEF16AD94C3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D316826F-4850-4869-9071-CCEF16AD94C3}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {5D73A650-C364-4DDD-B93B-55D0003D4048}
+	EndGlobalSection
+EndGlobal

Pinger/Dataset.cs

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+using CsvHelper;
+using CsvHelper.Configuration;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.IO;
+
+namespace Pinger
+{
+    public class Dataset
+    {
+        public static readonly string FileName = Environment.CurrentDirectory + @"\pings.csv";
+
+        public static IEnumerable<Record> Read()
+        {
+            using (var reader = new StreamReader(FileName))
+            using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
+            {
+                return csv.GetRecords<Record>();
+            }
+        }
+
+        public static void Write(Record record)
+        {
+            var config = new CsvConfiguration(CultureInfo.InvariantCulture)
+            {
+                HasHeaderRecord = false,
+            };
+            using (var stream = File.Open(FileName, FileMode.Append))
+            using (var writer = new StreamWriter(stream))
+            using (var csv = new CsvWriter(writer, config))
+            {
+                csv.WriteRecord(record);
+            }
+        }
+
+        public static void Init()
+        {
+            if (File.Exists(FileName))
+                return;
+
+            using (var writer = new StreamWriter(FileName))
+            using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))
+            {
+                csv.WriteHeader<Record>();
+                csv.NextRecord();
+            }
+        }
+    }
+}

Pinger/Pinger.csproj

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+<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
+
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <UseWindowsForms>true</UseWindowsForms>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="CsvHelper" Version="22.1.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="icon.ico">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="icon.png">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

Pinger/PingerAppContext.cs

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+using System.ComponentModel;
+using System.Diagnostics;
+using System.Windows.Forms;
+
+namespace Pinger
+{
+    public class PingerAppContext : ApplicationContext
+    {
+        private NotifyIcon trayIcon;
+        private Container components = new Container();
+
+        public PingerAppContext()
+        {
+            var contextMenu = new ContextMenuStrip();
+
+            var menuItemExit = new ToolStripMenuItem("Exit", null, (sender, e) => 
+            {
+                trayIcon.Visible = false;
+                Application.Exit();
+            });
+
+            var menuItemSettings = new ToolStripMenuItem("Settings", null, (sender, e) =>
+            {
+                Process.Start(Settings.FileName);
+            });
+
+            var menuItemViewData = new ToolStripMenuItem("View data", null, (sender, e) =>
+            {
+                Process.Start(Dataset.FileName);
+            });
+
+            contextMenu.Items.AddRange(new[] { menuItemViewData, menuItemSettings, menuItemExit });
+
+            trayIcon = new NotifyIcon(components)
+            {
+                ContextMenuStrip = contextMenu,
+                Icon = new System.Drawing.Icon("icon.ico"),
+                Text = "Pinger is collecting data!",
+                Visible = true
+            };
+        }
+    }
+}

Pinger/PingerCore.cs

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+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Net.NetworkInformation;
+using System.Threading;
+
+namespace Pinger
+{
+    class PingerCore
+    {
+        public void Collect()
+        {
+            Dataset.Init();
+            Settings.Init();
+
+            var settings = Settings.Read();
+
+            var pinger = new Ping();
+            Record record;
+
+            while (true)
+            {
+                record = new Record
+                { 
+                    RoundtripTime = pinger.Send(settings.host).RoundtripTime, 
+                    Timestamp = DateTime.Now
+                };
+
+                Dataset.Write(record);
+
+                Thread.Sleep(settings.frequencyInSec * 1000);
+            }
+        }        
+    }
+}

Pinger/Program.cs

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+using System;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Pinger
+{
+    static class Program
+    {
+        /// <summary>
+        ///  The main entry point for the application.
+        /// </summary>
+        [STAThread]
+        static void Main()
+        {
+            Task.Run(() => new PingerCore().Collect());
+
+            Application.SetHighDpiMode(HighDpiMode.SystemAware);
+            Application.EnableVisualStyles();
+            Application.SetCompatibleTextRenderingDefault(false);
+            Application.Run(new PingerAppContext());
+        }
+    }
+}

Pinger/Record.cs

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+using System;
+
+namespace Pinger
+{
+    public class Record
+    {
+        public long RoundtripTime { get; set; }
+        public DateTime Timestamp { get; set; }
+    }
+}

Pinger/Settings.cs

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+using System;
+using System.IO;
+using System.Text.Json;
+
+namespace Pinger
+{
+    public class Settings
+    {
+        public static readonly string FileName = Environment.CurrentDirectory + @"\settings.json";
+
+        public string host { get; set; } = "www.google.ca";
+        public int frequencyInSec { get; set; } = 3;
+
+        public static Settings Read()
+        {
+            return JsonSerializer.Deserialize<Settings>(File.ReadAllText(FileName));
+        }
+
+        public static void Write(Settings settings)
+        {
+            File.WriteAllText(FileName, JsonSerializer.Serialize(settings));
+        }
+
+        public static void Init()
+        {
+            if (File.Exists(FileName))
+                return;
+
+            Write(new Settings());
+        }
+    }
+}