'宣言 Public Class C1VerticalCenterAlignTool Inherits C1.WPF.RichTextBox.Ribbon.RichTextBoxToggleButtonTool(Of Nullable(Of C1VerticalAlignment)) Implements IUpdateableTool
public class C1VerticalCenterAlignTool : C1.WPF.RichTextBox.Ribbon.RichTextBoxToggleButtonTool<Nullable<C1VerticalAlignment>>, IUpdateableTool