'宣言 Public Class C1LeftAlignTool Inherits C1.Xaml.RichTextBox.C1ApplicationBarToggleButton(Of Nullable(Of C1TextAlignment)) Implements IUpdateableTool, Windows.UI.Xaml.Controls.ICommandBarElement, Windows.UI.Xaml.Controls.ICommandBarElement2
public class C1LeftAlignTool : C1.Xaml.RichTextBox.C1ApplicationBarToggleButton<Nullable<C1TextAlignment>>, IUpdateableTool, Windows.UI.Xaml.Controls.ICommandBarElement, Windows.UI.Xaml.Controls.ICommandBarElement2