Use a different charset for some specific requests in ASP.NET

I'm now using UTF-8 in my web application, but some clie开发者_JS百科nts would POST data in other charsets like GB2312. I can't set the <globalization requestEncoding="GB2312" /> because it would affect the whole site.

Can I use a charset for decoding the data for specific requests so that I can get the correct text via context.Request.Forms collections?