This page applies to the Telerik® UI for ASP.NET AJAX suite, formerly known as RadControls for ASP.NET AJAX.
In the following table, you can find the releases that introduce builds created against the various .NET versions.
| .NET version | First build introduced in | Last build provided in |
| 2.0 | Q4 2005 | Q3 2010 SP2 |
| 3.5 | Q1 2008 (2008.1.619) | R1 2023 SP1 |
| 4.0 | Q1 2010 (2010.1.309) | N/A |
| 4.5 | Q2 2012 SP1 (2012.2.724) | N/A |
| 4.6 | Q2 2015 SP2 (2015.2.826) | N/A |
| 4.7+ | R2 2017 SP2 (version 2017.2.503) | N/A |
| 4.7.1 | R1 2018 (version 2018.1.117) | N/A |
| 4.7.2 | R2 2018 (version 2018.2.516) | N/A |
| 4.8 | R2 2019 (version 2019.2.514) | N/A |
| 4.8.1 | R3 2022 (version 2022.3.913) | N/A |
To see which assemblies from your installation to use, review the Included Assemblies help article.
For the support lifecycle of old controls versions, see the Old Versions Support Policy help article.