messageformat-net

name	messageformat-net
description	Guidance for MessageFormat.NET (Jeffijoe.MessageFormat) ICU message formatting library. USE FOR: ICU MessageFormat pluralization, gender/select patterns, complex parameterized localization messages, locale-aware plural rules. DO NOT USE FOR: basic resource file localization (use resources-localization), culture formatting of dates/numbers (use globalization-localization), general i18n architecture (use i18n).
license	MIT
metadata	{"displayName":"MessageFormat.NET","author":"Tyler-R-Kendrick","version":"1.0.0"}
compatibility	["claude","copilot","cursor"]
references	[{"title":"MessageFormat.NET GitHub Repository","url":"https://github.com/jeffijoe/messageformat.net"},{"title":"MessageFormat NuGet Package","url":"https://www.nuget.org/packages/MessageFormat"}]

MessageFormat.NET

Overview

MessageFormat.NET (Jeffijoe.MessageFormat) is a .NET implementation of the ICU MessageFormat standard. It handles complex localization scenarios that simple string interpolation cannot address, such as pluralization rules that vary by language, gender-based text selection, and nested formatting patterns. Unlike basic resource lookups, MessageFormat enables a single format string to produce grammatically correct output across languages with different plural categories (zero, one, two, few, many, other).