Does the 10.13 SDK (.Net) support TLS 1.2

I was reading through the blog found at: https://www.esignlive.com/blog/esignlive-tls-support/, and what I would like to know does the 10.13 (.Net) SDK support TLS 1.2? Specifically our .Net solution is using the .Net 3.5 Framework, so I know I need to use the .Net 3.5 fix for that, but I don’t know if I still need the latest 11.12 version of the SDK. I did download the 11.12 SDK, but when I compiled out solution with that version I go the following error: “'Silanis.ESL.SDK.CeremonyLayoutSettingsBuilder' does not contain a definition for 'WithIFrame' and no extension method 'WithIFrame' accepting a first argument of type 'Silanis.ESL.SDK.CeremonyLayoutSettingsBuilder' could be found (are you missing a using directive or an assembly reference?).” Our current code executes the following:

CeremonyLayoutSettingsBuilder bldrLayout = CeremonyLayoutSettingsBuilder.NewCeremonyLayoutSettings();
bldrLayout.WithIFrame();

DocumentPackageSettingsBuilder bldrSettings = DocumentPackageSettingsBuilder.NewDocumentPackageSettings();
bldrSettings.WithCeremonyLayoutSettings(bldrLayout);

Ideally it would be nice to just use the current version we have of the SDK, 10.13, but if we have to upgrade how do I resolve the 'WithIFrame' error? Is this setting no longer valid? I’ve searched your documentation and can’t find anything in relation to this. One last thing: Is TLS 1.2 currently enabled in your production environment, can we issue calls over that protocol today? I can find info stating TLS 1.0 is disabled in the sandbox environment, but I can’t find anything as to what is and was is not enabled in your current production environment. Nate