public void AddMember(Account acc)
        {
            GroupMember mb = new GroupMember(acc);

            MemberList.Add(mb);
            this.pnlMember.flowLayoutPanel.Controls.Add(mb);
            mb.BtnRemoveClick(new SelectMemberHandler(this, acc).HandleRemove);
            this.pnlMember.UpdateUi();
            if (MemberList.Count >= 2)
            {
                this.btnCreateGroup.Enabled = true;
            }
        }