private void DeleteSeance_DateTimePicker_ValueChanged(object sender, EventArgs e)
 {
     DeleteSeance_ComboBox.Items.Clear();
     foreach (string i in GestionBDD.GetSeance(DeleteSeance_DateTimePicker.Value.Day.ToString()))
     {
         DeleteSeance_ComboBox.Items.Add(i);
     }
 }
 private void DeleteSeance_Button_Click(object sender, EventArgs e)
 {
     GestionBDD.AddEntre();
 }