'宣言 Public Class C1SimplifiedDraftViewTool Inherits C1.WPF.RichTextBox.C1ToggleItemTool(Of Nullable(Of TextViewMode)) Implements IUpdateableTool
public class C1SimplifiedDraftViewTool : C1.WPF.RichTextBox.C1ToggleItemTool<Nullable<TextViewMode>>, IUpdateableTool