Skip the old Codeplex installer. Use NuGet:
For Web Forms apps: Plan a strangler pattern migration – incrementally replace ACT controls with Razor Pages or Blazor components, all within Visual Studio 2022.
Unlike old versions (which required manual downloads from CodePlex), you now install ACT via . ajax control toolkit visual studio 2022
To enable "drag-and-drop" functionality, you must manually add the controls to your Visual Studio Toolbox:
The short answer is , but the installation process and development workflow have changed significantly from the days of Visual Studio 2010 or 2015. Skip the old Codeplex installer
You cannot currently use the Ajax Control Toolkit in a modern ASP.NET Core MVC or Blazor application. If you are building a new project in Visual Studio 2022, you should generally avoid the Ajax Control Toolkit in favor of modern front-end technologies. However, if you are migrating a legacy Web Forms app, you must target .NET Framework 4.8 within Visual Studio 2022.
It does not affect runtime. To suppress warnings, ensure your Web.config registration is correct and rebuild. However, if you are migrating a legacy Web
<system.web> <pages> <controls> <add tagPrefix="ajaxToolkit" assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" /> </controls> </pages> </system.web>