WPF，Loaded事件与Visibility属性值有关系？

一个自定义控件：

XML/HTML code?

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<ResourceDictionary     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     xmlns:local="clr-namespace:WPF2">     <Style TargetType="{x:Type local:CustomControl1}">         <Setter Property="Visibility" Value="Collapsed"/>         <Setter Property="Width" Value="100"/>         <Setter Property="Height" Value="30"/>         <Setter Property="Template">             <Setter.Value>                 <ControlTemplate TargetType="{x:Type local:CustomControl1}">                     <Border Name="PART_Border" Background="Red"/>                 </ControlTemplate>             </Setter.Value>         </Setter>     </Style> </ResourceDictionary>

C# code?

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public class CustomControl1 : Control {     static CustomControl1()     {         DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomControl1), new FrameworkPropertyMetadata(typeof(CustomControl1)));     }     public override void OnApplyTemplate()     {         base.OnApplyTemplate();         this.Loaded += CustomControl1_Loaded;     }     void CustomControl1_Loaded(object sender, RoutedEventArgs e)     {         MessageBox.Show("张三");     } }

XML/HTML code?

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<Window x:Class="WPF2.MainWindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         xmlns:local="clr-namespace:WPF2"          Title="MainWindow" Height="350" Width="525">     <Grid>         <local:CustomControl1 Margin="0,144,10,145" Width="Auto"/>     </Grid> </Window>

自定义控件CustomControl1的Visibility在样式中被设置为隐藏。CustomControl1控件还有一个Loaded事件。
现在出现这么一个现象：首次启动编译的时候，会弹出"张三"，说明CustomControl1控件响应了Loaded事件，然后，停止调试，再次启动编译之后，就再也不弹出对话框了，这是什么原因呢？而如果取消控件样式中的那句<Setter Property="Visibility" Value="Collapsed"/>，则不会这种情况，难道Visibility属性会影响Loaded事件吗？