WPF TreeView树节点双击实现编辑重命名，或F2键或右菜单重命名怎么实现呢？先谢谢了。

原始的TreeView实现代码：
<TreeView Name="tvProperties"  Padding="0" Margin="0" BorderThickness="1" KeyDown="tvProperties_KeyDown">
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate  ItemsSource="{Binding Path=Children}">
                    <StackPanel Orientation="Horizontal">
                        <Image VerticalAlignment="Center" Source="{Binding Icon}" Width="16" Height="16" Margin="0,0,2,2"></Image>
                        <TextBlock VerticalAlignment="Center" Text="{Binding DisplayName}" PreviewMouseRightButtonDown="TextBlock_PreviewMouseRightButtonDown"></TextBlock>
                        <TextBox VerticalAlignment="Center" Text="{Binding DisplayName}" Visibility = "Visible"></TextBox>
                        <StackPanel.ToolTip>
                            <TextBlock VerticalAlignment="Center" Text="{Binding Name}" TextWrapping="Wrap" MaxWidth="200" ></TextBlock>
                        </StackPanel.ToolTip>
                    </StackPanel>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>
后台代码：
private void ShowTreeView()
        {
            List<PropertyNodeItem> itemList = new List<PropertyNodeItem>();

            PropertyNodeItem node1 = new PropertyNodeItem()
            {
                DisplayName = "Node No.1",
                Name = "This is the discription of Node1. This is a folder.",
                Icon = @"\Icons\CBook.gif",
            };

            PropertyNodeItem node1tag1 = new PropertyNodeItem()
            {
                DisplayName = "Tag No.1",
                Name = "This is the discription of Tag 1. This is a tag.",
                Icon = @"\Icons\CBook.gif",
                EditIcon = @"\Icons\OBook.gif"
            };
            node1.Children.Add(node1tag1);

            PropertyNodeItem node1tag2 = new PropertyNodeItem()
            {
                DisplayName = "Tag No.2",
                Name = "This is the discription of Tag 2. This is a tag.",
                Icon = @"\Icons\CBook.gif",
            };
            node1.Children.Add(node1tag2);
            itemList.Add(node1);

            PropertyNodeItem node2 = new PropertyNodeItem()
            {
                DisplayName = "Node No.2",
                Name = "This is the discription of Node 2. This is a folder.",
                Icon = @"\Icons\CBook.gif",
            };

            PropertyNodeItem node2tag3 = new PropertyNodeItem()
            {
                DisplayName = "Tag No.3",
                Name = "This is the discription of Tag 3. This is a tag.",
                Icon = @"\Icons\CBook.gif",
            };
            node2.Children.Add(node2tag3);

            PropertyNodeItem node2tag4 = new PropertyNodeItem()
            {
                DisplayName = "Tag No.4",
                Name = "This is the discription of Tag 4. This is a tag.",
                Icon = @"\Icons\CBook.gif",
            };
            node2.Children.Add(node2tag4);
            itemList.Add(node2);

            this.tvProperties.ItemsSource = itemList;
        }

private void tvProperties_KeyDown(object sender, KeyEventArgs e)
        {
            if(e.Key ==Key.F2)
                {
                    未实现代码
                }

        }


        public class PropertyNodeItem
    {
        public string Icon { get; set; }
        public string EditIcon { get; set; }
        public string DisplayName { get; set; }
        public string Name { get; set; }
        public List<PropertyNodeItem> Children { get; set; }
        public PropertyNodeItem()
        {
            Children = new List<PropertyNodeItem>();
        }
    }