private void btnOk_Click(object sender, RoutedEventArgs e)
        {
            int numberWarrantyNetwork;

            if (string.IsNullOrEmpty(txtSection.Text))
            {
                MessageBox.Show("Must Have Section Number");
            }
            else if (string.IsNullOrEmpty(txtSectionDescription.Text))
            {
                MessageBox.Show("Must Have Section Description");
            }
            else if (cbxTaskType.SelectedItem == null)
            {
                MessageBox.Show("Must Select A Task Type");
            }
            else if ((!functions.IsNumeric(txtActivity.Text) ? false : txtActivity.Text.Length == 4))
            {
                Section section = new Section();
                if (chbxWarranty.IsChecked.Value)
                {
                    numberWarrantyNetwork         = project.Number_WarrantyNetwork;
                    section.Number_ProjectNetwork = numberWarrantyNetwork.ToString();
                }
                else
                {
                    numberWarrantyNetwork         = project.Number_Network;
                    section.Number_ProjectNetwork = numberWarrantyNetwork.ToString();
                }
                section.Number_Section       = txtSection.Text;
                section.Description_Section  = txtSectionDescription.Text;
                section.TaskType             = ((TaskType)cbxTaskType.SelectedItem).Id;
                section.Number_Activity      = txtActivity.Text;
                section.Description_Activity = ((TaskType)cbxTaskType.SelectedItem).Description;
                queries.CreateSection(section);
                parent.RefreshListBox_Sections(project);
            }
            else
            {
                MessageBox.Show("Must be numeric: 4 digits, no commas, preceding zeros");
            }
        }