Алгоритм поиска - C# (181953)

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

namespace ConsoleApplication1
{
    class Program
    {
 
        public class mySort : IComparer
        {

            int IComparer.Compare(Object x, Object y) 
            {
                Dog r = (Dog)x;
                Dog q = (Dog)y;
                Int32 ret = r.name.CompareTo(q.name); //менять где .name на то что нужно(.age, .poroda)
                if (ret == 0)
                {
                    return r.name.CompareTo(q.name); //тоже
                }
                else
                { return ret; }
           }
        }

        public class Dog : IComparable
        {
            public string name;
            public string poroda;
            public string pol;
            public int age;
            public int medal;
            public int CompareTo(Object rhs)
            {
                Dog r = (Dog)rhs;
                Int32 ret = this.name.CompareTo(r.name);// тожже
                return ret;
            }
        }

        static void read(ArrayList DOG, string filename)
        {
            Encoding enc = Encoding.GetEncoding(1251);
            StreamReader file = new StreamReader(filename, enc);
            while (true)
            {
                string st = file.ReadLine();
                if (st == null) break;
                string[] b = st.Split();
                Dog a = new Dog();
                a.name = b[0];
                a.poroda = b[1];
                a.pol = b[2];
                a.age = int.Parse(b[3]);
                a.medal = int.Parse(b[4]);
                DOG.Add(a);
 
            }
            file.Close();
        
        }

        static void Main(string[] args)
        {
 
            ArrayList DOG = new ArrayList();
 
            read(DOG, "dogs.txt");

            Console.WriteLine("\n");
 
            IComparer abc = new mySort();
            DOG.Sort(abc);
            Console.WriteLine("Сортировка по Кличке");
            foreach (Dog i in DOG)
            {
                Console.WriteLine(" {0} \t {1} \t {2} \t {3} \t {4}", i.name, i.poroda, i.pol, i.age, i.medal);
            }

            Console.WriteLine("\n");
            Console.WriteLine("Кого будем искать? \n");
 
            string l = Console.ReadLine();
            Dog q = new Dog();
            q.name = l; // и здесь
            
            object obj = q;

            int retVal = DOG.BinarySearch(obj);
            if (retVal >= 0)
            {
                Dog a = new Dog();
                a=(Dog)DOG[retVal];
                Console.WriteLine(" {0} \t {1} \t {2} \t {3} \t {4}", a.name, a.poroda, a.pol, a.age, a.medal);
            }
            else
            {
                Console.Write("No results");
            }

            Console.ReadLine();
 
        }
    }
}