using System.Linq;

using System.Text.RegularExpressions;

using System;

public class Program

{

    public static void Main()

    {

        string text = "Anna, would you like to go to America, Africa or Antarctica?";

​

        var words = Regex

           .Matches(text, @"A[\p{L}']*")

           .Cast<Match>()

           .Select(match => match.Value);

​

        foreach (string word in words) {

          Console.WriteLine(word);

        }

    }

}