something

 IEnumerable<string> query1 =
                from client in clients
                select client;

            IEnumerable<string> query2 =
               from company in companies
               select company;

            IEnumerable<string> query3 =
               from user in users
               select user;

            IEnumerable<string> query4 =
              from user in users
              where user.StartsWith("a")
              select user;

            IEnumerable<string> query5 =
               from client in clients
               where client.phone != null
               select client;

            IEnumerable<string> query6 =
               from user in users
               where user.isAdmin == true
               select user;

            IEnumerable<string> query7 =
               from company in companies
               where company.city == "Gliwice"
               select company;

            IEnumerable<string> query8 =
              from user in users
              where user.isAdmin == false
              select user;

            IEnumerable<string> query9 =
              from client in clients
              where client.phone == null
              select client;

            IEnumerable<string> queryOrder =
               from result in results
               orderby result
               select result;