public static StatisticsForm GetInstanceOfStaticsForm()
{
if (s_Instance == null)
{
s_Instance = new StatisticsForm();
}
return(s_Instance);
}
private void statisticsButton_Click(object sender, EventArgs e)
{
if (m_StatisticsForm == null)
{
m_StatisticsForm = StatisticsForm.GetInstanceOfStaticsForm();
}
m_StatisticsForm.BestCourseValueToImprove(CourseDiffrencesInData());
m_StatisticsForm.ShowDialog(GetDictionaryMarkByYears(), m_CalAvg);
}