using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication2
{
    class Program
    {


        static void Main(string[] args)
        {

            List<record> list = new List<record>() {new record{name = "Вася",date = DateTime.Now.AddDays(-10),time=DateTime.Now.AddHours(-10)},
                                                    new record{name = "Петя",date = DateTime.Now.AddDays(-30),time=DateTime.Now.AddHours(-30)}};

            var result = from rec in list
                         group rec by rec.name into group_records
                         select new { _name = group_records.Key, min_date = group_records.Min(x => x.date), min_time = group_records.Min(x => x.time) };

            foreach(var rec in result)
            {
                Console.Out.WriteLine(rec._name+" "+rec.min_date+" "+rec.min_time);

            }

            Console.ReadLine();
           
        }

    }


    class record {
        public String name;
        public DateTime date;
        public DateTime time;
    }
 
}