Asp.net标识我可以编写什么linq查询来返回所有具有角色的用户，包括没有角色的用户？

var usersWithRoles = from user in dbContext.Users
                     join userRole in dbContext.UserRoles on user.Id equals userRole.UserId into userRoles
                     from role in userRoles.DefaultIfEmpty()
                     select new
                     {
                         UserId = user.Id,
                         UserName = user.UserName,
                         Role = role != null ? role.RoleName : "No Role"
                     };

foreach (var user in usersWithRoles)
{
    Console.WriteLine($"User ID: {user.UserId}, User Name: {user.UserName}, Role: {user.Role}");
}