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+---
+title: Installing a Specific Older Version of Telerik UI for ASP.NET AJAX
+description: A guide on finding out the current version of Telerik UI for ASP.NET AJAX used in your project and installing that specific version.
+type: how-to
+page_title: How to Install an Older Version of Telerik UI for ASP.NET AJAX
+slug: install-specific-version-telerik-ui-aspnet-ajax
+tags: progress, telerik, ui, asp.net, ajax, version, install, download
+res_type: kb
+ticketid: 1667896
+---
+
+## Environment
+<table>
+<tbody>
+<tr>
+<td>Product</td>
+<td>UI for ASP.NET AJAX</td>
+</tr>
+<tr>
+<td>Version</td>
+<td>all</td>
+</tr>
+</tbody>
+</table>
+
+## Description
+I need to ensure that a new programmer in our team has the same older version of Telerik UI for ASP.NET AJAX as the rest of the team. How can I find out the current version we are using and then obtain and install that exact version?
+
+This KB article also answers the following questions:
+- How can I check the version of Telerik UI for ASP.NET AJAX in my project?
+- Where can I download an older version of Telerik UI for ASP.NET AJAX?
+- What are the steps to install a specific version of Telerik UI for ASP.NET AJAX?
+
+## Solution
+
+### Determine the Current Version
+To find out the current version of Telerik UI for ASP.NET AJAX used in your project:
+1. Navigate to the project's Bin folder.
+2. Locate the `Telerik.Web.UI.dll` file.
+3. Right-click the file, select Properties, and check the version under the Details tab.
+4. Alternatively, in Visual Studio, check the version in the project references.
+
+For more information, see [How to find out which is the used version of Telerik.Web.UI in the web application](https://www.telerik.com/products/aspnet-ajax/documentation/knowledge-base/common-assembly-version).
+
+### Access Telerik Account
+- Ensure you have access to your Telerik account at [https://www.telerik.com/account/downloads](https://www.telerik.com/account/downloads).
+
+### Download the Correct Version
+1. Log in to your Telerik account.
+2. Navigate to the product download page for UI for ASP.NET AJAX at [https://www.telerik.com/account/downloads/product-download?product=RCAJAX](https://www.telerik.com/account/downloads/product-download?product=RCAJAX).
+3. Expand the "Versions" dropdown to find and select the required version.
+4. Download the selected version.
+
+### Installation
+- To install the controls, use the MSI files provided in the download or extract the DLLs from hotfix archives and add them to your project.
+
+Refer to the following resources for more details on installation:
+- [Installation Approaches](https://www.telerik.com/products/aspnet-ajax/documentation/getting-started/installation/installation-approaches)
+- [Which File Do I Need to Install](https://www.telerik.com/products/aspnet-ajax/documentation/getting-started/installation/which-file-do-i-need-to-install)
+- [Included Assemblies](https://www.telerik.com/products/aspnet-ajax/documentation/getting-started/installation/included-assemblies)
+- [Using Hotfix](https://www.telerik.com/products/aspnet-ajax/documentation/getting-started/installation/using-hotfix)
+- [First Steps with MSI](https://www.telerik.com/products/aspnet-ajax/documentation/getting-started/first-steps-msi)
+- [First Steps with ZIP](https://www.telerik.com/products/aspnet-ajax/documentation/getting-started/first-steps-zip)
+
+## See Also
+- [Telerik UI for ASP.NET AJAX Documentation](https://docs.telerik.com/aspnet-ajax/introduction)
+