Returns the number of internal control designers in the System.Windows.Forms.Design.ControlDesigner.
The number of internal control designers in the System.Windows.Forms.Design.ControlDesigner.
An internal control is a control that is not in the System.ComponentModel.IContainer.Components collection of the System.ComponentModel.Design.IDesignerHost.Container. System.Windows.Forms.SplitterPanel is an example of one such control.