using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<Profile> profiles = GenerateData(10);

        ShowData(profiles);

        var groupedProfiles = profiles.GroupBy(x => new { x.Name, x.Messagedate }).Select(p => new Profile(

                p.Key.Name,

                p.Key.Messagedate,

                p.Sum(x => x.LengthMessage),

                p.Sum(x => x.LengthAudio),

                p.Sum(x => x.LengthVideo),

                p.Sum(x => x.PictureCount)

                ));

            Console.WriteLine("Grouped data:");

            ShowData(groupedProfiles);

    }

        private static void ShowData(IEnumerable<Profile> profiles)

        {

            foreach (var item in profiles)

            {

                Console.WriteLine(item);

            }

            Console.WriteLine();

        }

​

        private static List<Profile> GenerateData(int n)

        {

            List<string> names = new List<string>();

            names.Add("Рамазан");

            names.Add(  "Рамжеш");

            names.Add("Пиздеш");

​

            var rand = new Random();

            List<Profile> result = new List<Profile>();

            for (int i = 0; i < n; i++)

            {

                result.Add(

                    new Profile(names[rand.Next(names.Count - 1)],

                    DateTime.Today.AddDays(-1 * rand.Next(2)),

                    rand.Next(10),

                    rand.Next(10),

                    rand.Next(10),

                    rand.Next(10)

                    ));

            }

            return result;

        }

}

​

public class Profile

{

        public Profile(string name, DateTime messagedate, int lengthMessage, int lengthVideo, int lengthAudio, int pictureCount)

        {

            Name = name;

            Messagedate = messagedate;

            LengthMessage = lengthMessage;

            LengthVideo = lengthVideo;

            LengthAudio = lengthAudio;

            PictureCount = pictureCount;

        }

​

        public string Name { get; set; }

    public DateTime Messagedate { get; set; }

    public int LengthMessage { get; set; }

    public int LengthVideo { get; set; }

    public int LengthAudio { get; set; }

    public int PictureCount { get; set; }

        public override string ToString()

        {

            return $"{Name}  {Messagedate} Message:{LengthMessage} Video: {LengthVideo} Audio:{LengthVideo} Picture:{PictureCount}";

        }

    }