Let the user design forms

Is there a way to instantiate the VisualStudio forms toolbox while an application is already deployed? (but with the developer package installed on the PC)

The project itself should be up and running, and I know that code can be compiled by runtime into DLLs.

My goal is, that a user for the product can natively create forms at his own behalf and maybe save them down, in markup or even better compiled to have them available at the next start.

To have them integrated in the best possible manner, my wish would be that the solution shouldn't rely on a third party forms (e-forms) package, but with the help of the in .NET integrated features.