private void btn_courses_Click(object sender, EventArgs e)
{
enablePanel(btn_courses);
// By add Panel to Panel
if (ImportNewDataFromFile) {
panel_CourseList_cards.setNewList(importCourses);
panel_CourseList_array.setNewList(importCourses);
ImportNewDataFromFile = false;
}
panel_CourseList_cards.setSelectionByLessonsList(importCourses);
pnl_coursList = panel_CourseList_cards.getPanel();
panelMain.Controls.Add(pnl_coursList);
}