/// <summary>
        /// btnManageAttendance_Click - manage track worker status(isApplied, isSelected, isPresent)
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnManageAttendance_Click(object sender, EventArgs e)
        {
            //MessageBox.Show(string.Join("\n", _clientEvent.TrackWorkersId));
            DataGridViewForm dataGridViewForm = new DataGridViewForm(this, _clientsEvents_TrackWorkers);

            dataGridViewForm.ShowDialog();
        }
        /// <summary>
        /// btnSelectEvent_Click - for adding client event for mailing
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSelectEvent_Click(object sender, EventArgs e)
        {
            DataGridViewForm dataGridViewForm = new DataGridViewForm(this, ClientEventDataAccess.LoadClientEvent());

            dataGridViewForm.ShowDialog();
        }
        /// <summary>
        /// btnManageTrackWorker_Click - for adding track worker for client event
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnManageTrackWorker_Click(object sender, EventArgs e)
        {
            DataGridViewForm dataGridViewForm = new DataGridViewForm(this, TrackWorkerDataAccess.LoadTrackWorker(), _clientsEvents_TrackWorkers);

            dataGridViewForm.ShowDialog();
        }
        /// <summary>
        /// btnClientAdd_Click - for adding track for client event
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnTrackAdd_Click(object sender, EventArgs e)
        {
            DataGridViewForm dataGridViewForm = new DataGridViewForm(this, TrackDataAccess.LoadTrack());

            dataGridViewForm.ShowDialog();
        }