![]() ![]() I've also did almost every combination of changes to the system registry I've found. I've already tried with the "Microsoft EasyFix" found here (and on many answers on the web) with no results. ServicePointManager.ServerCertificateValidationCallback = delegate ", ex) ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 Here's my code public static LicenseInfoDTO GetLicenseInfo() The same call with Postman works well even from Windows7. NET Framework 4.5 (to tell the truth, the real application is 4.0 and I'm using a workaround to enable TLS1.2, but I've created a test app with 4.5 and native TLS1.2 management, still having the same problem: so it's not related to the workaround). Everything is fine on Windows 10, but when I run the app on Windows 7 (or Windows Server 2008 R2 or Windows Server 2012) the exception "Could not create ssl/tls secure channel" is thrown. I have a C# application calling a web service. ![]() I know there's a lot of people asking for this but I think I've read answers and questions with no results for too long now.
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