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Compare String.Join and Aggregate()
IEnumerable<string> values = Enumerable.Repeat("Foo", 100);
Stopwatch watch = new Stopwatch();
Console.WriteLine(String.Join("<br/>", values));
Console.WriteLine("Performance with Join: {0}", watch.Elapsed);
// "Performance with Join: 00:00:00.0001146"
Console.WriteLine(values.Aggregate ((x, y) => string.Format("{0}<br/>{1}", x, y)));
Console.WriteLine("Performance with Aggregate: {0}", watch.Elapsed);
// "Performance with Aggregate: 00:00:00.0002650
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