问题
What is the purpose of the MediaTypeWithQualityHeaderValue parameter when attempting to set the "Content-Type" header property on a request? The MSDN documentation simply states:
Represents a content-type header value with an additional quality.
What specifically is meant by 'an additional quality'?
回答1:
The purpose is to comply with the HTTP standard, which under section 3.9 defines quality values. You can read further about it in RFC 2616. Here is a link : http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html
来源：https://stackoverflow.com/questions/42007325/c-sharp-httpclient-why-mediatypewithqualityheadervalue