c# Webrequest through https (configured) proxy (The ServicePointManager does not support proxies of https scheme)

Here seemes to be a better place, than stackoverflow. I would like a MSFT to again target this very important question. Or at least point to a working solution. THANK YOU

I need to connect to a https-url by using a proxy which also has a https address. My code is simply like this:

var webRequest =(HttpWebRequest)WebRequest.Create("https://reallywhatsthepoint.com");var proxy =newWebProxy(newUri("https://proxyaddress:port"));
webRequest.Proxy= proxy;WebResponse webResponse = webRequest.GetResponse();

Doing this I get a well known Error:

The ServicePointManager does not support proxies of https scheme

No credential-code here for simplicity. And no, the users will not change the proxy to http.

Now there are some hints, that this cannot be achieved like: Microsoft blog or MSDN forum but these are all a little old and this states, that at least Chrome and Firefox seem to have a solution to that issue.

Can anyone tell me, how to get to a https address through a proxy which itself can only be reached through https?

The ServicePointManager should be able to do this by now, is there some development?

Thx!!