Added new kb article licensing-restore-telerik-controls-visual-studio-toolbox (#661)

Co-authored-by: KB Bot <[email protected]>

Author: github-actions[bot]

knowledge-base/licensing-restore-telerik-controls-visual-studio-toolbox.md

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+---
+title: Unable to place Telerik controls in Visual Studio toolbox after 2025 Q1
+description: This article provides a workaround for when Telerik controls do not appear in the Visual Studio toolbox following the installation of Telerik UI for ASP.NET AJAX.
+type: troubleshooting
+page_title: How to Restore Telerik Controls in Visual Studio Toolbox Post Installation
+slug: licensing-restore-telerik-controls-visual-studio-toolbox
+tags: visual studio, toolbox, installation, controls, dll, workaround
+res_type: kb
+ticketid: 1679086
+---
+
+## Environment
+
+<table>
+<tbody>
+<tr>
+<td>Product</td>
+<td>Progress® Telerik® UI for ASP.NET AJAX</td>
+</tr>
+<tr>
+<td>Version</td>
+<td>2025.1.211</td>
+</tr>
+</tbody>
+</table>
+
+## Description
+
+After installing the 2025 Q1 release of Telerik UI for ASP.NET AJAX, the Telerik controls disappeared from the Visual Studio toolbox, making it impossible to place the Telerik controls again.
+
+## Cause
+
+The issue is due to the 2025 Q1 MSI installer not placing the `Telerik.Licensing.Runtime.dll` (which is now referenced by the `Telerik.Web.UI.dll` assembly) in the Bin folder. This omission prevents the Toolbox from recognizing the controls.
+
+## Solution
+
+To resolve the issue, manually copy the `Telerik.Licensing.Runtime.dll` into the same directory as the `Telerik.Web.UI.dll`. For example, copy it to `C:\Program Files (x86)\Progress\Telerik UI for ASP.NET AJAX 2025 Q1\Bin462\`. After copying the DLL, re-add the controls to the Visual Studio Toolbox. This manual workaround has been confirmed by several users to resolve the problem.
+
+A fix is currently in progress, and a hotfix release is targeted for the near future, which should eliminate the need for this manual step.
+
+For more details on this issue, see the bug report: [AJAX Visual Studio extensions don't add Telerik references when creating or upgrading projects](https://feedback.telerik.com/aspnet-ajax/1678809-ajax-visual-studio-extensions-don-t-add-telerik-references-when-creating-or-upgrading-projects).
+
+## See Also
+
+- [Telerik UI for ASP.NET AJAX Documentation](https://docs.telerik.com/devtools/aspnet-ajax/introduction)
+- [How to Manually Add Telerik Controls to the Visual Studio Toolbox](https://docs.telerik.com/devtools/aspnet-ajax/general-information/adding-the-telerik-controls-to-the-visual-studio-toolbox)
+- [Troubleshooting Telerik UI for ASP.NET AJAX Installation](https://docs.telerik.com/devtools/aspnet-ajax/installation/installing-the-controls/troubleshooting-installation)
+