[Silverlight] ListBoxの各ItemでToolTip表示したい。

ListBoxの各Itemにラジオボタンを表示しようとする場合、
IsHitTestVisible="True"とすると挙動がおかしくなる。
ただし、IsHitTestVisible="False"にするとToolTipがうまく表示されなくて悩みました。
下記のようなコードで解決しました。


```c#:Person.cs
using System;
using System.ComponentModel;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace SilverlightApplication5
{
    public class Person : INotifyPropertyChanged
    {
        public string Name
        {
            set;
            get;
        }

        private bool _isSelected = false;
        public bool IsSelected
        {
            set
            {
                _isSelected = value;
                OnPropertyChanged("IsSelected");
            }
            get { return _isSelected; }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string propertyName)
        {
            if (this.PropertyChanged != null)
            {
                this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
            }
        }
    }
}
```

```xml:MainPage.xaml
<UserControl x:Class="SilverlightApplication5.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:toolkit="http://schemas.microsoft.com/winfx/2006/xaml/presentation/toolkit"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">
        <ListBox x:Name="personList"
            SelectionChanged="personList_SelectionChanged"
                 >
            <ListBox.ItemsPanel>
                <ItemsPanelTemplate>
                    <toolkit:WrapPanel
                        Width="300"
                        ></toolkit:WrapPanel>
                </ItemsPanelTemplate>
            </ListBox.ItemsPanel>
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <RadioButton Content="{Binding Name}"
                        Checked="RadioButton_Checked"
                        IsHitTestVisible="False"
                        IsChecked="{Binding IsSelected, Mode=TwoWay}"
                        >
                    </RadioButton>
                </DataTemplate>
            </ListBox.ItemTemplate>
            <ListBox.ItemContainerStyle>
                <Style TargetType="ListBoxItem">
                    <Setter Property="ToolTipService.ToolTip" Value="{Binding Name}"/>
                </Style>
            </ListBox.ItemContainerStyle>
        </ListBox>
    </Grid>
</UserControl>
```

```c#:MainPage.xaml.cs
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

namespace SilverlightApplication5
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
            ObservableCollection<Person> persons = new ObservableCollection<Person>
            {
    　　        new Person { Name = "Test1"},
    　　        new Person { Name = "Test2"},
    　　        new Person { Name = "Test3"},
    　　        new Person { Name = "Test4"},
    　　        new Person { Name = "Test5"},
    　　        new Person { Name = "Test6"},
    　　        new Person { Name = "Test7"},
    　　        new Person { Name = "Test8"},
    　　        new Person { Name = "Test9"},
    　　        new Person { Name = "Test10"},
            };

            this.personList.ItemsSource = persons;
        }

        private void RadioButton_Checked(object sender, RoutedEventArgs e)
        {
        }

        private void personList_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            (e.AddedItems[0] as Person).IsSelected = true;
        }
    }
}
```