Reactions to story from Omer van Kloeten's .NET Zen
Linq: FirstOrFallback
http://weblogs.asp.net/ okloeten/ archive/ 2008/ 04/ 23/ 6123904.aspx
Sometimes you want to use FirstOrDefault, but the default value of T is a valid value that might get returned. If you used FirstOrDefault, you wouldn't know whether the value that you got is a valid first or the default fallback. I use FirstOrFallback to explicitly specify which fallback value I want, rather than always use default(T): public static T FirstOrFallback<T>(this IEnumerable<T> enumeration, T fallback) { // Check to see that enumeration is not null if (enumeration == null) throw new ArgumentNullException("enumeration"); IEnumerator<T> enumerator = enumeration.GetEnumerator();
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