Reliable grammar and spell checker for ASP.NET

Does anyone know of a non-free spell checker and grammar check component?

I say non-free because we need one that is robust and really works with support. Jquery's is not up to par for .net because it requires a PHP page. Doesn't do grammar anyway.

JSpell works 开发者_如何学JAVApretty good and the price is right but does not do grammar.

Telerik you have to buy the entire suite of their tools and theirs does not do grammar.

Karamasoft has one and is affordable but requires using MS Word on the server and is not recommended for a website unless only a few people will using the site spell checker.

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Check out RapidSpell Web .NET. It has a slew of features and even contains some multilingual dictionaries:

RapidSpell Web .NET v3.8.0:
http://keyoti.com/products/rapidspell/dotNetWeb/index.html

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Wintertree software has a reasonable spell checker.