Hello, Bernadette,

As of R1 2021, it is possible to define which theme is your default theme (e.g. ControlDefault) for the controls even at design time. This can be defined in the App.config file. Please refer to the following help article: https://docs.telerik.com/devtools/winforms/styling-and-appearance/default-theme

I believe that you see the Fluent theme as default for the new forms that you create. Is this the case? The Fluent theme is now a part of the Telerik.WinControls assembly and it is statically available everywhere just like the ControlDefault theme. As a result, it is no longer necessary to instantiate the FluentTheme type.

If you want to see ControlDefault as your default theme at design time, you can either delete the app.config file or specify the theme you want as default in the app.config file as it is demonstrated in the referred article.

In case you are still experiencing any further difficulties, it would be greatly appreciated if you can specify the exact steps that you perform and what is the undesired behavior that you are facing. Sample screenshots would be also very helpful. Thank you in advance for your cooperation.

I am looking forward to your reply.

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik