using System;
using System.Text.RegularExpressions;

public class Test
{
	public static void Main()
	{
		var s = "First, Last <email1@example.com>; First, Last <email2@example.com>;";
		Regex regex = new Regex(@"<([^>]+)>");
		foreach (Match m in regex.Matches(s)) {
			Console.WriteLine(m.Groups[1]);
		}
	}
}