Problem when connecting to a SOAP service with .Net Core 2.0 behind a proxy

Hello

I'm using Visual Studio 2017

I have noticed that it was not possible to connect to a SOAP service from a .Net Core 2.0 when being behind a proxy (when connected directly to the internet it's working and when connecting through the proxy from a .Net Core 1.1 app it's working too).

I have created a little test program (Console app) that calls a public SOAP service (http://www.webservicex.net/globalweather.asmx).

By changing the target of this program (.Net Core 1.1 / .Net Core 2.0) I can reproduce the problem.

I have done a network capture (with Wireshark) and when this problem happens I can see no HTTP request coming out from my computer.

Does anybody know what is going wrong ? Maybe I am not calling this service the right way.

Thanks in advance