private void btnSearchMember_Click(object sender, EventArgs e)
        {
            frm13MemberSearch f = new frm13MemberSearch();
            DialogResult      r = f.ShowDialog(this);

            f.Location = this.Location;

            if (r == DialogResult.OK)
            {
                Member m = context.Members.Where(x => x.MemberID == f.SelectedID).First();
                txMemberID.Text = m.MemberID;
            }
        }
        private void btnSearch_Click(object sender, EventArgs e)
        {
            frm13MemberSearch f = new frm13MemberSearch();
            DialogResult      r = f.ShowDialog(this);

            f.Location = this.Location;

            if (r == DialogResult.OK)
            {
                txCustomerID.Text = f.SelectedID;
                m        = context.Members.Where(x => x.MemberID == f.SelectedID).First();
                position = membersList.IndexOf(m);
                display(m);
                btnUpdate.Enabled   = true;
                btnAdd.Enabled      = true;
                btnBorrow.Enabled   = true;
                btnReturn.Enabled   = true;
                btnRetrieve.Enabled = false;
                btnConfirm.Enabled  = false;

                btnChangeColor(btnAdd, false);
                btnChangeColor(btnUpdate, false);
            }
        }