What is new in Visual Studio 2008 vs 2005 or C# 3.0 vs C# 2.0?

Person person = new Person();
person.Name = "John Smith";

Person person = new Person() { Name = "John Smith" };

List<string> list = new List<string> { "foo", "bar" };

people.Where(delegate(person) { return person.Age >= 21;);

people.Where(person => person.Age >= 21 );

public static class StringUtilities
{
    public static string Pluralize(this word)
    {
       ...
    }
}

string word = "person";
word.Pluralize(); // Returns "people"

var book = new { Title: "...", Cost: "..." };

public int Id { get; set; }

private int _id;
public int Id {
    get { return _id; }
    set { _id = value; }
}