'Declaration
Public MustInherit Class RichTextBoxListTool Inherits C1.WPF.RichTextBox.Ribbon.RichTextBoxToggleButtonTool(Of Nullable(Of TextMarkerStyle)) Implements IUpdateableTool
public abstract class RichTextBoxListTool : C1.WPF.RichTextBox.Ribbon.RichTextBoxToggleButtonTool<Nullable<TextMarkerStyle>>, IUpdateableTool