Telerik Compoment not shown inToolBox in VS2026 and Someting wrong (WinForm)

[林]

1.  i install    Telerik UI for WinForm  using Telerik_UI_For_WinForms_2025_4_1111.msi 

2. i can use create Telerik Winform Project and can download License Key to my PC using VS2026

3. But i can not see Telerik Compoment in ToolBox and somethingwrong in the new Telerik Winform Project 

[Nadya | Tech Support Engineer]

Hello,

I am really sorry to hear that you have experienced difficulties after downloading the latest version. There is nothing wrong with this version 2025.4.111. We have also tested it on VS 2026. 

May I ask you which framework you are using on your side? I am providing below two documentation articles depending on the framework that you are using, which can be useful in resolving issues with adding our control in the toolbox at design time after upgrade:

• If you are using .NET Framework, you can check the following article: Adding RadControls to Visual Studio Toolbox in .NET Framework Projects
• If you are using .NET, then check the following article: Adding RadControls to Visual Studio Toolbox in .NET Projects

I hope this information helps. Please let me know if you require any additional assistance.

Regards,
Nadya | Tech Support Engineer
Progress Telerik

[林]

i use VS2026  .net 10  

using .Net

if i use VS2022

the problems not shown

[Nadya | Tech Support Engineer]

Hello,

I am not able to observe such a problem on my side with VS 2026. See the image below, it does load all Telerik WinForms components in the toolbox in VS 2026:

Is it possible to provide the project where you are facing the issue? When I have the specific project, I should be able to examine it further.