private void btnDelete_Click(object sender, EventArgs e)
        {
            if (MessageBox.Show("Do You really want to delete this House?", "DELETE", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)
            {
                int refhouse = (int)gridAll.Rows[gridAll.CurrentRow.Index].Cells[0].Value;

                if (admin.Delete_House(refhouse))
                {
                    MessageBox.Show("House ID" + refhouse + " is successfully Deleted", "House Deleted");
                }
                else
                {
                    MessageBox.Show("House ID " + refhouse + " is not deleted.", "Try Again");
                }
            }
            admin.Refresh_Database();
            gridAll.DataSource = admin.Search_All_Houses();
            ButtonControl(true, true, false, false, true, false);
        }