ICU MessageFormat implementation for .NET enabling locale-aware pluralization, gender selection, and number/date formatting.
MessageFormatter for .NET is an implementation of the ICU MessageFormat specification that enables complex, locale-aware formatting of user interface strings. It allows developers to handle pluralization, gender selection, and number/date formatting through a single message pattern, solving internationalization challenges in .NET applications. The library provides a standardized way to create adaptable messages that work across different languages and cultural contexts.
.NET developers building applications requiring internationalization (i18n) and localization (l10n), particularly those needing to handle complex pluralization rules, gender-based text variations, or locale-specific formatting.
Developers choose MessageFormatter for .NET because it's a faithful, high-performance implementation of the ICU standard without heavy dependencies. It offers extensibility through custom formatters, built-in caching for performance, and compatibility with existing ICU message patterns used in other ecosystems.
ICU MessageFormat implementation for .NET.
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Uses a hand-written parser without regex or generator tools, with built-in caching that reduces parsing overhead for repeated patterns, as benchmarked in the README with up to 40% faster release builds.
Fully implements the Unicode Consortium's ICU MessageFormat specification, ensuring reliable and consistent message formatting for internationalization across languages and platforms.
Supports custom formatters for numbers, dates, and times via CustomValueFormatter or lambda-based approaches, allowing developers to tailor formatting to specific needs without modifying core library code.
Allows readable formatting of complex message patterns with nested blocks and flexible indentation, making it easier to maintain and debug ICU patterns directly in code.
Relies on .NET's built-in formatting or custom implementations for locale-specific rules beyond pluralization, requiring extra work for full internationalization of numbers, dates, and times.
Built-in caching shows marginal benefits in some benchmarks; the README notes that on certain machines, the difference is minimal, making it less reliable for all high-throughput scenarios.
Requires familiarity with ICU MessageFormat syntax, which can be error-prone with nested blocks, escaping rules, and plural categories, increasing initial setup and debugging time.