eror

[mamasexeno]

WebException: The request was aborted: Could not create SSL/TLS secure channel.

[effi10]

Hi

I have the same issue (in a VSTO addon - I haven't this issue in WinForm apps)

[effi10]

I found a solution : add this line before httpclient call.

ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;