private void ButtonClickSave(object sender, RoutedEventArgs e)
        {
            try
            {
                if (String.IsNullOrEmpty(TextFamile.Text) && String.IsNullOrEmpty(TextName.Text) && String.IsNullOrEmpty(TextDoubleName.Text) &&
                    String.IsNullOrEmpty(TextAdres.Text) && String.IsNullOrEmpty(TextPostalAdres.Text) && String.IsNullOrEmpty(TextMS.Text) &&
                    String.IsNullOrEmpty(TextNumberPhone.Text) && String.IsNullOrEmpty(TextEmaill.Text) &&
                    String.IsNullOrEmpty(TextBank.Text) && String.IsNullOrEmpty(TextPaymentAccount.Text) && String.IsNullOrEmpty(TextINNAndKPP.Text) &&
                    String.IsNullOrEmpty(TextBIC.Text) && String.IsNullOrEmpty(TextCorrespondentAccount.Text))
                {
                    MessageBox.Show("Не все поля заполнены", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
                else
                {
                    string query = $"insert Clients (Surname,Name,Otchestvo,Emall,Phone,Adres,MailingAddress,INNandKPP,PaymentAccount,Bank,CorrespondentAccount,BIC,MsPassport)" +
                                   $" values " +
                                   $"(N'{TextFamile.Text}',N'{TextName.Text}',N'{TextDoubleName.Text}',N'{TextEmaill.Text}',N'{TextNumberPhone.Text}',N'{TextAdres.Text}',N'{TextPostalAdres.Text}',N'{TextINNAndKPP.Text}',N'{TextPaymentAccount.Text}',N'{TextBank.Text}',{TextCorrespondentAccount.Text},N'{TextBIC.Text}',N'{TextMS.Text}')";
                    DateClass Add = new DateClass();
                    Add.NewAdd(ConnectionString, query);
                    Close();

                    View.Show();
                }
            }
            catch
            {
            }
        }
 private void ButtonClickRegistration(object sender, RoutedEventArgs e)
 {
     if (String.IsNullOrEmpty(TextFamile.Text) && String.IsNullOrEmpty(TextName.Text) &&
         String.IsNullOrEmpty(TextDoubleName.Text) && String.IsNullOrEmpty(TextEmail.Text) &&
         String.IsNullOrEmpty(TextNumber.Text))
     {
         MessageBox.Show("Не все поля заполнены", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
     }
     else
     {
         string    query = $"insert Insurance_agent (Surname,Name,Otchestvo,Emall,Phone) values (N'{TextFamile.Text}',N'{TextName.Text}',N'{TextDoubleName.Text}',N'{TextEmail.Text}',N'{TextNumber.Text}')";
         DateClass Add   = new DateClass();
         Add.NewAdd(MainWindow.connectionString, query);
         main.Show();
         this.Close();
     }
 }