private void btnUpdate_Click(object sender, EventArgs e)
        {
            DateTime tarih  = dateTimePicker1.Value;
            string   format = "d MMM yyyy";//tarihe uygulanacak format
            string   a      = tarih.ToString(format);

            DateTime saat    = dateTimePicker2.Value;
            string   format1 = "HH:mm";
            string   b       = saat.ToString(format1);

            int NumberOfSelected = listView1.SelectedItems.Count;

            foreach (ListViewItem SelectedItems in listView1.SelectedItems)
            {
                int i = 0;
                SelectedItems.Remove();
                while (i < records.Count)
                {
                    if (records[i].note == SelectedItems.Text)
                    {
                        records.RemoveAt(i);
                        using (var writer = new StreamWriter(Functions.bingPathToAppDir("\\data\\reminder.csv")))
                            using (var csv2 = new CsvWriter(writer, CultureInfo.InvariantCulture))
                            {
                                csv2.WriteRecords(records);
                            }
                    }
                    i++;
                }
            }
            var writeRecord = new calender
            {
                username = Login.CurrentUser.Username,
                type     = comboBox1.Text,
                note     = txtNote.Text,
                date     = a,
                clock    = b
            };

            records.Add(writeRecord);
            using (var writer = new StreamWriter(Functions.bingPathToAppDir("\\data\\reminder.csv")))
                using (var csv2 = new CsvWriter(writer, CultureInfo.InvariantCulture))
                {
                    csv2.WriteRecords(records);
                }

            listView1.Items.Clear();
            foreach (var person in records)
            {
                if (person.username == Login.CurrentUser.Username)
                {
                    var row = new string[] { person.type, person.note, person.date, person.clock };
                    var lvi = new ListViewItem(row);

                    lvi.Tag = person;
                    listView1.Items.Add(lvi);
                }
            }
        }
        private void btnAdd_Click(object sender, EventArgs e)
        {
            DateTime tarih  = dateTimePicker1.Value;
            string   format = "d MMM yyyy";//gün ay yıl şeklinde csv'de tutmak için bu formata çevrildi.
            string   a      = tarih.ToString(format);

            DateTime saat    = dateTimePicker2.Value;
            string   format1 = "HH:mm"; // Saat formatın doğru olması için.
            string   b       = saat.ToString(format1);

            if (comboBox1.Text != string.Empty && txtNote.Text != string.Empty)
            {
                var writeRecord = new calender
                {
                    username = Login.CurrentUser.Username,
                    type     = comboBox1.Text,
                    note     = txtNote.Text,
                    date     = a,
                    clock    = b
                };
                records.Add(writeRecord);
                using (var writer = new StreamWriter(Functions.bingPathToAppDir("\\data\\reminder.csv")))
                    using (var csv2 = new CsvWriter(writer, CultureInfo.InvariantCulture))
                    {
                        csv2.WriteRecords(records);
                    }

                listView1.Items.Clear();
                foreach (var person in records)
                {
                    if (Login.CurrentUser.Username == person.username)
                    {
                        var row = new string[] { person.type, person.note, person.date, person.clock };
                        var lvi = new ListViewItem(row);
                        lvi.Tag = person;
                        listView1.Items.Add(lvi);
                    }
                }

                MessageBox.Show("Reminder Added");
            }
            else
            {
                MessageBox.Show("Please fill in the empty fields.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            listView1.Visible = false;
            btnUpdate.Enabled = false;
            btnDelete.Enabled = false;

            if (!System.IO.File.Exists(Functions.bingPathToAppDir("\\data\\reminder.csv")))
            {
                System.IO.FileStream f = System.IO.File.Create(Functions.bingPathToAppDir("\\data\\reminder.csv"));
                f.Close();
            }
            using (var reader = new StreamReader(Functions.bingPathToAppDir("\\data\\reminder.csv")))
                using (var csv = new CsvHelper.CsvReader(reader, CultureInfo.InvariantCulture))
                {
                    csv.Read();
                    csv.ReadHeader();
                    while (csv.Read())
                    {
                        var record = new calender
                        {
                            username = csv.GetField("username"),
                            type     = csv.GetField("type"),
                            note     = csv.GetField("note"),
                            date     = csv.GetField("date"),
                            clock    = csv.GetField("clock")
                        };
                        records.Add(record);
                    }
                }
            listView1.Items.Clear();
            foreach (var person in records)
            {
                if (Login.CurrentUser.Username == person.username)
                {
                    var row = new string[] { person.type, person.note, person.date, person.clock };
                    var lvi = new ListViewItem(row);

                    lvi.Tag = person;
                    listView1.Items.Add(lvi);
                }
            }
        }
 private void Form2_Load(object sender, EventArgs e)
 {
     Flag = true;
     testc();
     if (!System.IO.File.Exists(Functions.bingPathToAppDir("\\data\\reminder.csv")))
     {
         System.IO.FileStream f = System.IO.File.Create(Functions.bingPathToAppDir("\\data\\reminder.csv"));
         f.Close();
     }
     // load recods from users csv file
     using (var reader = new StreamReader(Functions.bingPathToAppDir("\\data\\reminder.csv")))
         using (var csv = new CsvHelper.CsvReader(reader, CultureInfo.InvariantCulture))
         {
             csv.Read();
             csv.ReadHeader();
             while (csv.Read())
             {
                 var record = new calender
                 {
                     username = csv.GetField("username"),
                     type     = csv.GetField("type"),
                     note     = csv.GetField("note"),
                     date     = csv.GetField("date"),
                     clock    = csv.GetField("clock")
                 };
                 data.Add(record);
             }
         }
     foreach (var person in data)
     {
         if (Login.CurrentUser.Username == person.username)
         {
             pictureBox1.Visible = true;
             label2.Visible      = true;
             label3.Visible      = true;
             label2.Text         = person.note;
             label3.Text         = person.date + "  " + person.clock;
         }
     }
 }