The virtual readonly SelectionRules property of the ControlDesigner class is necessary if you want to fiddle with the selection grabs of your control at designtime (if you want to make your control not re-sizable vertically like the Windows Forms TextBox control). You might experience a control design...

Some control properties where dropped. Forms still have them in InitializeComponent. Form is loaded at designtime with an attached debugger instance (devenv.exe). CodeDomSerializer class tries to deserialize the said property set. A MissingMethodException was raised. Attached debugger could not give...

It is interesting to know how the Designers works in Visual Studio when one is designing a component, control or form (controls and forms by the way are special kind of components with visual representation at the document surface). Knowing such kind of information can be crucial for a Windows Form Developer...