public object Users() { return(_userRepository.Entities().Take(10) .GroupJoin(_userRoleRepository.Entities(), a => a.Id, b => b.UserId, (a, b) => new { a.Id, a.UserName, a.UserTrueName, a.Password, a.CreateDate, Roles = b.Select(m => new { RoleName = "RoleId_" + m.RoleId }) }).ToList()); }