Overview
I couldn't find a client-side spell check that worked with Asp.Net, so I decided to use Brandon Aaron's jQuery plugin, "Spell Check". He gives you an PHP file to handle the request to the Google API, but I don't use PHP on my server, so I had to create the following Asp.Net Generic Handler.Create a Generic Handler

Copy and paste this into the Generic Handler you just created:
string text, body, lang; lang = context.Request.QueryString["lang"]; text = HttpUtility.UrlDecode(context.Request.QueryString["text"]); body = "" + "" + " "; WebClient client = new WebClient(); client.Headers.Add("Content-Type", "text/xml"); byte[] buffer = Encoding.UTF8.GetBytes(body); byte[] response = client.UploadData("https://www.google.com/tbproxy/spell?lang=" + lang, "POST", buffer); string result = Encoding.UTF8.GetString(response); context.Response.ContentType = "text/xml"; context.Response.Write(result);" + text + " " + "
Change the URL
Need to change the url in the jquery.spellcheck.js file (line 44 in Version 0.2-pre):