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Telerik Version 2009.01.0402.20 compatible with .Net Framework 4.5?

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answered on 06 Jul 2015, 02:54 PM

Hi Abhishek,

The 4.5 version of .NET Framework was officially released in the middle of August 2012 and so there are not .NET 4.5 compatible DLLs included into the controls version from 2009 used by you. The first official version of the Telerik UI for ASP.NET AJAX providing .NET 4.5 support is 2012 Q3 (2012.3.1016) and this is the minimum version of the control to which you have to upgrade.

As for the upgrading itself, the easiest way to do it is to follow the instruction from the following blog post: Upgrade Your Telerik ASP.NET Controls in 6 Easy Steps. Note, though, that 3 years are much time for development and there might be important changes introduced in the controls during this time span. This is why, I would advice that you make a back-up of the project and review the Release notes of the controls before the upgrade, checking for changes that may break your current implementation: Release history.

Regards,
Vessy
Telerik

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answered on 10 Jul 2015, 05:28 AM

Hi Vessy,

Many thanks for the reply. We may have to use the new features in the near future so we would anyways upgrade to the latest version only.

I have just one more query, may be you can help me with that as well. I have .Net Framework 4.5 on my system. I am still referring to the old Telerik version (just added the Telerik.Web.UI dll version-2009.01.402.20 to Visual Studio 2012 solution). I am getting the below error in design mode when I add Telerik controls to any of the pages however the controls are displayed properly and everything works as expected when I run the code/solution (I was expecting an error)? Is this the expected behavior in case the Telerik version is not compatible with the target framework?

Error Message in design mode- "Failed to create designer 'Telerik.Web.UI.RadCalender", Telerik.Web.UI, Version=2009.1.402.20, Culture = neutral, PublicKeyTone=121fae78165ba3d4"

Not sure if this error is because of the fact that I haven't added the reference to Telerik.Web.Design dll?

Web Config Entry-

Again, I am not concerned about the error in the design mode, I just want to understand how come I am not getting any error when I run the solution.

Thanks,

Abhishek Chauhan

answered on 15 Jul 2015, 08:03 AM

Hi Vessy,

Thanks again for the confirmation however I have already mentioned that I am not much concerned about the error in design mode. My question is that if the version (2009.01.0402.20) I am suing is not compatible with .Net framework 4.5 then how come I am not getting any relevant error. You have already confirmed that once I add the reference to Telerik.Web.Design to the project (following instructions given in the URL provided by you), the design mode error will be fixed i.e. everything will work as expected (which is not exactly what I was expecting; I was hoping to get some error suggesting that the version used is not compatible with .Net framework 4.5).

Here I am only concerned to establish that the version 2009.01.0402.20 is not going to work with .Net framework 4.5 so that I can convince my leads/organisation to procure the licences for the latest Telerik version .

We need to initiate the migration/upgrade this month itself, grateful if you can respond quickly so that I can request my organisation to procure the licences at the earliest.

Regards,

Abhishek Chauhan

Accepted

answered on 20 Jul 2015, 07:45 AM

Hi Abhishek,

There is no error thrown when you are running a .NET 4.5 application with .NET 2.0 DLLs due to the Microsoft Support Lifecycle Policy. This means that there is legacy support provided by Microsoft for the previous .NET versions (like .NET 2.0) and if you want to use the .NET 4.5 new features in your project, outside the scope of the Telerik controls, you can keep on using the currently use version of the controls. If you want to utilize the .NET 4.5 functionality of the Telerik UI for ASP.NET AJAX controls, though, you will need to upgrade the Telerik DLLs to a version, supporting .NET 4.5.

I hope this information sheds some light on the subject. Let me know if I can be of any further assistance on this matter.

Regards,
Vessy
Telerik

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Telerik Version 2009.01.0402.20 compatible with .Net Framework 4.5?

11 Answers, 1 is accepted