private async void button2_Click(object sender, EventArgs e)
{
this.comboBoxListDiscipline.SelectedIndexChanged += new EventHandler(comboboxListDiscipline_SelectedIndexChanged);
await Task.Factory.StartNew(() =>
{
InvokeUI(() =>
{
var _listGroup = WorkWithDB.GetListGroupForDiscipline(DisciplineName).AsParallel();
if (WorkWithDB.GetListGroupForDiscipline(DisciplineName) != null)
{
AddItemToComboBox(comboBoxListGroups, _listGroup);
}
else
{
MessageBox.Show("Таких групп нет!");
}
_listGroup.ToList().Clear();
});
});
}