public bool LoadMemo(string memoId)
        {
            var ret = _facade.MainForm.Invoke(
                (Func <bool>)(() => {
                var info = _facade.FindMemoInfoByMemoId(memoId);
                return(_facade.LoadMemo(info));
            })
                );

            if (ret is bool)
            {
                return((bool)ret);
            }
            else
            {
                return(false);
            }
        }