ASP.net allows the developer to encode the page using character sets other than unicode.  If your ASP.net page containing foreign characters does not render properly when served from our webservers, you may need to change the FileEncoding setting in the web.config file.

<globalization requestEncoding=""
       responseEncoding=""
       culture="en-US"
       uiCulture="de-DE"/>
 
For more information on code page, please review these articles