RAD画布仪表板应用winforms

I am looking to build an application where the end user can drag-and-drop controls onto a form at run time. I have searched for a lot on this topic but not sure what exactly this type of application is called. I have searched for canvas app, dashboard app, component app, widgets, visual programming, and diagramming. My vision is a bit different from Visual Studio style interface because instead of windows in that I imagine each component is can be dragged onto a surface. I have seen this accomplished using either grid layouts or canvas style layouts. I don't really need "connectors" as one would have in a diagramming but would like the "surface" capabilities.I am looking to build an application where the