private void LoadData()
        {
            try
            {
                List <ModelContractAgent> listCA = serviceCA.GetList();
                if (listCA != null)
                {
                    comboBoxAgent.DisplayMember = "Id";
                    comboBoxAgent.ValueMember   = "Id";
                    comboBoxAgent.DataSource    = listCA;
                    comboBoxAgent.SelectedItem  = null;
                }

                List <ModelClient> listC = serviceC.GetList(new DateTime().AddYears(2000), DateTime.Now.AddYears(10));
                if (listC != null)
                {
                    comboBoxClient.DisplayMember = "FIO";
                    comboBoxClient.ValueMember   = "Id";
                    comboBoxClient.DataSource    = listC;
                    comboBoxClient.SelectedItem  = null;
                }

                List <ModelServices> listS = serviceS.GetList();
                if (listS != null)
                {
                    toolStripComboBoxService.ComboBox.DisplayMember = "NameService";
                    toolStripComboBoxService.ComboBox.ValueMember   = "Id";
                    toolStripComboBoxService.ComboBox.DataSource    = listS;
                    toolStripComboBoxService.ComboBox.SelectedItem  = 0;
                }

                textBoxSum.Text = "0";

                if (ID != null)
                {
                    List <ModelDirectory> list = serviceCC.GetListDirection(ID);
                    if (list != null)
                    {
                        dataGridView1.DataSource = list;
                        dataGridView1.Columns[1].AutoSizeMode =
                            DataGridViewAutoSizeColumnMode.Fill;
                        dataGridView1.Columns[4].Visible = false;
                        dataGridView1.Columns[5].Visible = false;
                    }

                    ModelContractClient elem = serviceCC.GetElement(Convert.ToInt32(ID));
                    if (elem != null)
                    {
                        ModelClient client = serviceC.GetElement(elem.ClientId);
                        comboBoxAgent.Text    = elem.AgentId + "";
                        comboBoxClient.Text   = client.FIO;
                        dateTimePicker1.Value = elem.DateStart;
                        dateTimePicker2.Value = elem.DateEnd;
                    }

                    textBoxSum.Text = serviceCC.GetSum(Convert.ToInt32(ID));
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK,
                                MessageBoxIcon.Error);
            }
        }