void tsmi_Disconnect_Clicked(object sender, EventArgs e)
{
user_statistics_container = new UserStatisticsContainer();
stats = new Statistics();
number_of_sessions = 0;
talk_duration_less_than_a_minute.YValues = new[] { 0.0 };
talk_duration_over_a_minute.YValues = new[] { 0.0 };
presenter.Disconnect();
c_CallsInProgressStatistics.Series.Clear();
}
void tsmi_Disconnect_Click(object sender, EventArgs e)
{
presenter.Disconnect();
}