Is there any algorithm in c# to singularize - pluralize a word?

Question

Is there any algorithm in c# to singularize - pluralize a word (in english) or does exist a .net library to do this (may be also in different languages)?

Answer 1

Subsonic 3 has an Inflector class which impressed me by turning Person into People. I peeked at the source and found it naturally cheats a little with a hardcoded list but that's really the only way of doing it in English and how humans do it - we remember the singular and plural of each word and don't just apply a rule. As there's not masculine/feminine(/neutral) to add to the mix it's a lot simpler.

Here's a snippet:

AddSingularRule("^(ox)en", "$1");
AddSingularRule("(vert|ind)ices$", "$1ex");
AddSingularRule("(matr)ices$", "$1ix");
AddSingularRule("(quiz)zes$", "$1");

AddIrregularRule("person", "people");
AddIrregularRule("man", "men");
AddIrregularRule("child", "children");
AddIrregularRule("sex", "sexes");
AddIrregularRule("tax", "taxes");
AddIrregularRule("move", "moves");

AddUnknownCountRule("equipment");

It accounts for some words not having plural equivalents, like the equipment example. As you can probably tell it does a simple Regex replace using $1.

Update:
It appears Subsonic's Inflector is infact the Castle ActiveRecord Inflector class!