windows ce连接数据库时，总是提示未知错误

private SqlCeConnection con=null;
        string constr = "Data Source=MyDatabase#1.sdf;password=test;encrypt database=TRUE";
        /// <summary>
        /// /////得到数据库连接方法
        /// </summary>
        /// <returns></returns>
        internal SqlCeConnection GetConnection()
        {
            if (con == null)
            {
                con = new SqlCeConnection(constr);
                try
                {
                    con.Open();
                }
                catch (SqlCeException ex)
                {
                    throw  ex;
                }


            }
            else if (con.State == ConnectionState.Closed || con.State == ConnectionState.Broken)
            {
                con.Open();
            }
            return con;
        }

运行至open时提示未知错误! --------------------编程问答-------------------- http://download.csdn.net/detail/liyu1128/3009185 --------------------编程问答-------------------- Unspecified error [ Test.sdf ] --------------------编程问答-------------------- 表示一下疑问，有密码连接？没试过，也没看到sqlce下可以建立带密码的.sdf数据库

--------------------编程问答-------------------- 到没遇到过 很少用SQLCE了 用SQLLITE多些

补充：移动开发 ,  Windows Phone