いまにゅーにお昼きかれたやつ、こうすればいいんじゃないん、って思ったやつ（その２）

MainPage.xaml

<StackPanel>
  <local:MyControl Button.Click="ButtonClick" />
  <Grid x:Name="HogeGrid" Visibility="Collapsed" />
</StackPanel>

MainPage.xaml.cs

public class MainPage : Page
{
  public MainPage()
  {
    InitializeComponents();
  }
  
  public void ButtonClick(object sender, RoutedEventArgs args)
  {
    HogeGrid.Visibility = Visibility.Visible;
  }
}

MyControl.xaml

<Button x:Name="Button 1" Content="Button 1" Click="ButtonClick" />
<Button x:Name="Button 2" Content="Button 2" />

MyControl.xaml.cs

public class MyControl : UserControl
{
  public MyControl()
  {
    InitializeComponents();
  }
  
  public void ButtonClick(object sender, RoutedEventArgs args)
  {
    args.Handled = true;
  }
}