c# - How to set Accept-Language in WebBrowser -

I am trying to set acceptance language for webbrowser control like this:

 < Code> .. string header = "accept: app / xml" + environment New Line + "Accept-language: UK-U" var wb = New Webbrozer (); Wb.Navigate (userLink, blank, empty, header);   
 But it works for  accept  and does not work for  accept-language .  
 How to set the acceptance-language for request from this control?   
 
 
 The following  
 
 remove all the headers from the Carriage Return Linefeed pair must be given.   
  string header = "accept: app / xml \ r \ n accept-language: uk-ua \ r \ n";