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using System;
using System.Collections.Specialized;
class Program
{
public static void Main(string[] args)
{
var chat = new ChatClient();
var lines = new StringCollection() { "a", "b", "c" };
chat.Say("test", lines);
}
}
class ChatClient
{
public void Say(string to, string message)
{
Console.WriteLine("{0}: {1}", to, message);
}
}
static class ChatExtensions
{
public static void Say(this ChatClient chat, string to, StringCollection lines)
{
foreach (string line in lines)
{
chat.Say(to, line);
}
}
}
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