'宣言 Public Class C1BoldTool Inherits C1.WPF.RichTextBox.Ribbon.RichTextBoxToggleButtonTool(Of Nullable(Of FontWeight)) Implements IUpdateableTool
public class C1BoldTool : C1.WPF.RichTextBox.Ribbon.RichTextBoxToggleButtonTool<Nullable<FontWeight>>, IUpdateableTool