Environment

I have a project that uses the SplitContainer and its designer at runtime. It was working fine in .NET framework(4.8) but after upgrading to .net6.0 the control is not visible on designer site.

.NET version

I have upgraded the project from .Net framework(4.8) to .Net6.0.

Did this work in a previous version of Visual Studio and/or previous .NET release?

It was working fine in .Net Framework 4.8.

Issue description

We have provided a feature to our customers in which the controls of the forms can be resized and relocated at runtime.
Then it is stored as a xml file and reloaded when reopened the same form.
After upgrading to .net6.0 the designer of the form is not visible in edit mode at runtime.

Steps to reproduce

https://www.c-sharpcorner.com/UploadFile/asmabegam/easy-form-design-at-run-time-C-Sharp-winform/

Diagnostics

No response