private void btnAdd_Click(object sender, EventArgs e)
        {
            frmUserDetail frm = new frmUserDetail();

            frm.ShowDialog();

            usersTableAdapter1.Fill(sampleTableAdapterDataSet1.users);
        }
        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (dataGridView1.SelectedRows.Count == 0)
            {
                return;
            }

            string selectedUserId = dataGridView1.SelectedRows[0].Cells["useridDataGridViewTextBoxColumn"].Value.ToString();

            SampleTableAdapterDataSet.usersRow selectedUser = sampleTableAdapterDataSet1.users.Where(x => x.user_id == selectedUserId).SingleOrDefault();

            frmUserDetail frm = new frmUserDetail(SharedCommon.ActionType.Delete, selectedUser);

            frm.ShowDialog();

            usersTableAdapter1.Fill(sampleTableAdapterDataSet1.users);
        }