Options for ASPNet Spell
ASPNet Spell
The AspNetSpell component provides international spell checking for your ASP.Net web forms. It can be installed and integrated into most applications in a few minutes.

AspNetSpell behaves very similarly to MS Word's own spellchecker, making this software familiar to users. The software includes familiar features such as Grammar Checking and Personal Dictionaries.

AspNetSpell is compatible with ASP.Net 1 and 2 (C# / VB.Net / J# / C++ .Net). The code it delivers is W3C HTML and XHTML compliant, and has a good degree of accessibility.

International Language Support
AspNetSpell has excellent international language support. In addition, you can setup custom dictionaries from text files. The primary languages supported are:

English (Australia)
English (Canada)
English (International)
English (UK)
English (USA)

Quickstart Guide
Quickstart Guide
Once you have downloaded and unzipped AspNetSpell to a convenient location on your hard disk, you have 2 primary sets of files:

1. AspNetSpell.dll
Add this to your Visual Studio toolbox. For full instructions, refer to the installation reference

2. A Directory of files labeled AspNetSpell
Copy and paste this to the root folder of your website project. You do not need to add this to the application in Visual Studio.

Using AspNetSpell for the First Time
Drag the AspNetSpell control from the toolbox onto your ASPX web form in design mode.
You will see that it renders as a spell check button (if not read this).

To select the field(s) that AspNetSpell will spell check, change the FieldsToSpellCheck property.

FieldsToSpellCheck is very diverse in that you can enter a Design time or Run Time id for any object in the webpage - and it can be spellchecked. In Visual Studio 2005, it will automatically give you a list of IDs to choose from.
Program details
Downloads month: 3
Company: ASPNetSpell
Release date: 2009-02-21
Version: 2.42
License: Shareware
Price: $99
Supported OS': Windows NT 4.x, Windows 2000, Windows XP
screenshot - click to enlarge the File Extensions site!