private async void btnAdd_Click(object sender, EventArgs e)
        {
            AddFarm dialog = new AddFarm();
            var     result = await dialog.ShowForm(null);

            if (result != DialogResult.Cancel)
            {
                refresh();
            }
        }
        private async void btnEditSelected_Click(object sender, EventArgs e)
        {
            AddFarm         dialog = new AddFarm();
            DataGridViewRow row    = null;

            if (dataGridFarms.SelectedRows.Count > 0)
            {
                row = dataGridFarms.SelectedRows[0];
                FarmEntity doc    = (FarmEntity)row.DataBoundItem;
                var        result = await dialog.ShowForm(doc);

                if (result != DialogResult.Cancel)
                {
                    refresh();
                }
            }
            else
            {
                MessageBox.Show("Please select a row to edit.");
            }
        }