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

namespace LinqToUserDataApplication
{
  public class User
  {
    public string UserName { get; set; }
    public string City { get; set; }
    public string Phone { get; set; }

    public override string ToString()
    {
      return UserName + "\t" + City + "\t" + Phone;
    }
  }

  class Program
  {
    static void Main(string[] args)
    {
       var users = new List
       {
        new User { UserName = "Смирнов", City = "Москва", Phone = "0201513165" },
        new User { UserName = "Иванов", City = "Москва", Phone = "74854646" },
        new User { UserName = "Петров", City = "Питер", Phone = "6786876" },
        new User { UserName = "Сидоров", City = "Питер", Phone = "454849" },
        new User { UserName = "Фленов", City = "Питер", Phone = "489678" },
        new User { UserName = "Леонов", City = "Бабруйск", Phone = "7897964" }
       };

       var results = from c in users
             where c.City == "Москва"
             select c;

       foreach (var c in results)
         Console.WriteLine(c);

       Console.ReadLine();
    }
  }
}