Does anyone know if it's possible to set the encoding attr in the prolog when using C# HttpClient's PostAsXmlAsync method.
When I look at the requests in Fiddler I can see the encoding in the content-type http header, but I need in the prolog like this:
<?xml version="1.0" encoding="UTF-8"?>
The XML declaration (what you call "prolog") is optional. When it states version 1.0 and encoding UTF-8, it's even redundant, because those values are the defaults.
In an HTTP transmission the authoritative information about payload encoding is given in the Content-Type header, so it's practical not to send a possibly conflicting piece of information in the payload itself.
So to me it looks as if the HttpClientExtensions class does the right thing.
