[Feature request]Developers can add custom non-visual classes/controls to the VS IDE toolbox in the easiest way possible.

[vfp9]

Is your feature request related to a problem? Please describe.
All classes/controls in the VFP IDE can be displayed in the toolbar/class browser, and classes can be dragged and dropped interactively onto forms even directly from the Project Manager.But the same operation is not possible in X#.

Describe the solution you'd like
In X#, I can add timer/ErrorProvider interactively in WinForm, and I'd like to be able to add custom non-visual classes/controls in the same way.