using System;
using System.Collections;
using System.Collections.Generic;

public class Test
{
	public static void Main()
	{
		List<Person> list = new List<Person>()
		{
			new Person("Adrian", "Abramowicz"),
			new Person("Krzysiek", "Abramowicz"),
			new Person("Krzysiek", "Kowalski"),
			new Person("Marian", "Zawada")
		};
		
		BubbleSort(list);
		
		foreach(Person p in list)
			Console.WriteLine(p.Surname + " " +  p.Name);
		
	}
	
	public static void BubbleSort(List<Person> list)
	{
		for (int i = 0; i < list.Count; i++)
		{
			for (int j = 0; j < list.Count - 1; j++)
			{
				if (list[j] > list[j+1])
				{
					Person temp = list[j];
					list[j] = list[j+1];
					list[j+1] = temp;
				}
			}
		}
	}
}

public class Person : IComparable, IComparable<Person>
{
	public Person(string name, string surname)
	{
		Name = name;
		Surname = surname;
	}
	
	public string Name {get; private set;}
	public string Surname {get; private set;}
	
	public override int GetHashCode()
	{
		return Name.GetHashCode() ^ Surname.GetHashCode();
	}
	
	public override bool Equals(Object obj)
	{
		Person other = obj as Person;
		
		return Equals(other);
	}
	
	public bool Equals(Person other)
	{
		if (object.ReferenceEquals(other, null))
			return false;
		
		if (!Surname.Equals(other.Surname))
			return false;
			
		if (!Name.Equals(other.Name))
			return false;
			
		return true;
	}
	
	public int CompareTo(object obj)
	{
		Person other = obj as Person;
		
		return CompareTo(other);
	}
	
	public int CompareTo(Person other)
    {
       	if (object.ReferenceEquals(other, null))
			return 1;
	   	
	    int result = string.Compare(this.Surname, other.Surname, StringComparison.OrdinalIgnoreCase);
	    
	    if (result == 0)
	    	result = string.Compare(this.Name, other.Name, StringComparison.OrdinalIgnoreCase);
	    	
	    return result;
    }
    
    public static int Compare(Person left, Person right)
    {
        if (object.ReferenceEquals(left, right))
            return 0;
            
        if (object.ReferenceEquals(left, null))
            return -1;
            
        int result = string.Compare(left.Surname, right.Surname, StringComparison.OrdinalIgnoreCase);
	    
	    if (result == 0)
	    	result = string.Compare(left.Name, right.Name, StringComparison.OrdinalIgnoreCase);
	    	
	    return result;
    }
    
    public static bool operator < (Person left, Person right)
    {
        return (Compare(left, right) < 0);
    }
    
    public static bool operator > (Person left, Person right)
    {
        return (Compare(left, right) > 0);
    }
}