private void FillComboBoxes()
 {
     GroupList.Clear();
     FacultyList.Clear();
     DBUtils.GetGroupList(GroupList);
     DBUtils.GetFacultyList(FacultyList);
     Result1ComBox.Items.Clear();
     Result2ComBox.Items.Clear();
     Result5ComBox.Items.Clear();
     foreach (string gr in GroupList)
     {
         Result1ComBox.Items.Add(gr);
         Result5ComBox.Items.Add(gr);
     }
     foreach (string fl in FacultyList)
     {
         Result2ComBox.Items.Add(fl);
     }
 }