var query = (from r in db.Roles from u in db.Users where u.Id == R.UserId select new ListItem { UserName = u.UserName, Name = r.Name }).ToList();
query 得到的是两条数据如何才能做成一条数据,
UserName为{liuwu},name加,拼接为{IAM,Administrator}这样子的一条数据呢
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