https://learn.microsoft.com/ja-jp/uwp/api/windows.web.http.headers.httpproductheadervalue?view=winrt-28000
HttpProductHeaderValue Class (Windows.Web.Http.Headers) - Windows apps | Microsoft Learn
Represents product information used by the HttpProductHeaderValue and HttpProductInfoHeaderValueCollection classes in the User-Agent HTTP header.
http headersclasswindowswebapps