.net framework 4.0 support tls 1.1 or not

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Hi All,
Good morning.. Now am working an application which is using API for payment. Current version of .net framework is 4.0. I couldn't upgrade my framework. But i have to use tls1.1 here. when i using tls1.1 it throws error."System.net.SecurityProtocolType" does not contain the definition for Tls11

Is there any way for achieve above requirement.

Thanks,
DK

What I have tried:

Due to protection level i cant change registry.

Posted 7-Mar-17 2:57am

Dhineshkumar Velmayil

Updated 7-Mar-17 3:04am

v2

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2 solutions

Solution 1

It would appear from this: SslProtocols Enumeration (System.Security.Authentication)[^] that .NET V4.0 only supports TLS 1.0 - you would need to upgrade the framework to 4.5 to use 1.1

Either talk to your management, or the authors of the API.

Posted 7-Mar-17 3:01am

OriginalGriff

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Richard Deeming 7-Mar-17 9:02am

Snap! :)

OriginalGriff 7-Mar-17 9:14am

:DOnly by 60 seconds or less!

Dhineshkumar Velmayil 16-Mar-17 6:39am

Thanks for your reply, is there any issue happened in application if we upgrade the framework only.

Dhineshkumar Velmayil 24-Mar-17 4:14am

Hi All,
Thanks for your support. But now my team wants to upgrade 4.0 to 4.6. i have checked with websites. 4.0 to 4.5 i don't see any major impact. But i need some valuable suggestions regards this 4.0 to 4.6 upgrade process. Kindly tell your suggestions.

Thanks,
DK

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Richard Deeming · Accepted Answer · 2017-03-07T03:02:00

Solution 2

No, .NET Framework 4.0 does not support TLS 1.1; you'll need to upgrade to at least .NET 4.5 to support that protocol.

Look at the documentation: SslProtocols Enumeration (System.Security.Authentication)[^] - support for TLS 1.1 and 1.2 was added in v4.5 of the framework.

Posted 7-Mar-17 3:02am

Richard Deeming

Comments

Dhineshkumar Velmayil 16-Mar-17 6:39am

Thanks for your reply, is there any issue happened in application if we upgrade the framework only.

OriginalGriff 16-Mar-17 6:57am

Shouldn't be - I don't think they removed anything between the two versions. Added some stuff, but I've not had a problem going up versions so far.

Richard Deeming 16-Mar-17 8:08am

I've not seen any problems, but it's probably worth reviewing the change lists on MSDN:

* Version Compatibility in the .NET Framework[^]
* Application Compatibility in 4.5[^]
* Application Compatibility in 4.5.1[^]
* Application Compatibility in 4.5.2[^]
* Application Compatibility in 4.6[^]
* Application Compatibility in 4.6.1[^]
* Application Compatibility in 4.6.2[^]

Dhineshkumar Velmayil 16-Mar-17 8:54am

Thank you guys...
DK

Dhineshkumar Velmayil 24-Mar-17 4:14am

Hi All,
Thanks for your support. But now my team wants to upgrade 4.0 to 4.6. i have checked with websites. 4.0 to 4.5 i don't see any major impact. But i need some valuable suggestions regards this 4.0 to 4.6 upgrade process. Kindly tell your suggestions.

Thanks,
DK

Richard Deeming 24-Mar-17 8:02am

Again, I haven't seen anything obvious, but it would probably be worth reviewing the links I posted previously.

Dhineshkumar Velmayil 25-Mar-17 8:17am

thanks for your reply richard. In .net 4.0 to 4.5 i didnt see any major impact. But while upgrade from 4.0 to 4.6 many known issues occured (Ref: https://support.microsoft.com/en-in/help/3047761/known-issues-for-the-.net-framework-4.6). Do you have any idea richard, am new to .net world so i need some valuable suggestion from experts.

Thanks,
DK

Richard Deeming 27-Mar-17 13:34pm

Go with 4.6.2 instead, which is the latest version.

I'd strongly recommend setting up a copy of your application on a test system, upgrading that, and then checking for issues. If it all works, you should be able to upgrade the live system; otherwise, you'll need to try to resolve the issues first, or contact Microsoft support.