using System;

using System.Linq;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Person[] people = {

            new Person(){ FirstName="Steve", LastName="Jobs"},

            new Person(){ FirstName="Bill", LastName="Gates"},

            new Person(){ FirstName="Steve", LastName="Jobs"},

            new Person(){ FirstName="Lary", LastName="Page"}

        };

        var dist = people.Distinct(new PersonNameComparer()).ToArray();

        Array.ForEach(dist, v => Console.WriteLine(v.FirstName + " " + v.LastName));

    }

}

​

class Person

{

    public int Id { get; set; }

    public string FirstName { get; set; }

    public string LastName { get; set; }

}

​

class PersonNameComparer : IEqualityComparer<Person>

    {

​

        public bool Equals(Person x, Person y)

        {

            return x.FirstName == y.FirstName && x.LastName == y.LastName;

        }

​

        public int GetHashCode(Person obj)

        {

            return obj.Id.GetHashCode() ^ (obj.FirstName == null ? 0 : obj.FirstName.GetHashCode()) ^ (obj.LastName == null ? 0 : obj.LastName.GetHashCode());

        }

    }