C# Windows Service ,The request was aborted: Could not create SSL/TLS secure channel with SecurityProtocol

Question

So We have windows service api that gets data then send to web using webclient the problem is we have this certain branch that sends error while other branches api are working fine except for this one branch that sends error:

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

i have added

ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;

yet the error still occured , please help and thankyou

heres the code

When you say "branch" do you mean a code branch in eg a git repo? — Caius Jard, Mar 11 '20 at 08:10
var request = webclient.uploadvalues(website url, namevaluecollection data to be pass) its data to be pass to web — Gowther, Mar 11 '20 at 08:15
@CaiusJard I guess by "branch" they mean "route", "specific request url" — vasily.sib, Mar 11 '20 at 08:24
It's [not recomended](https://learn.microsoft.com/en-us/dotnet/api/system.net.webclient#remarks) to use `WebClient` (see Remarks section) — vasily.sib, Mar 11 '20 at 08:25
@vasily.sib I did also wonder if it's a physical location like "the London office", "the New York store" etc — Caius Jard, Mar 11 '20 at 08:26

score 0 · Answer 1 · answered Mar 11 '20 at 08:44

I'm guessing you already followed the top voted here: The request was aborted: Could not create SSL/TLS secure channel

Try to extend you tls protocols like this, so that it can fallback to previous versions if the server does not support them:

ServicePointManager.Expect100Continue = true;
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls
               | SecurityProtocolType.Tls11
               | SecurityProtocolType.Tls12
               | SecurityProtocolType.Ssl3;

If it doesn't work still, try the answer by User:APW with extra troubleshooting steps.

C# Windows Service ,The request was aborted: Could not create SSL/TLS secure channel with SecurityProtocol

1 Answers1