WPF Treeview HierarchicalDataTemplate Плъзнете и пуснете

Имам дървовиден изглед в wpf, който е изграден с помощта на xaml по-долу. Това е добре структуриран източник на данни и имам много проблеми с плъзгане и пускане. Опитах няколко метода, всички без резултат. Може ли някой да ми каже каква е стандартната процедура за извършване на този тип неща?

<TreeView x:Name="_treeView" ItemsSource="{Binding}"   Grid.Row="0" Grid.Column="0">
            <TreeView.Resources>
                <HierarchicalDataTemplate DataType="{x:Type Logic:Statement}"
                              ItemsSource="{Binding Path=PagedChildren}">
                    <TextBlock Text="{Binding StatementName}"/>
                </HierarchicalDataTemplate>

                <HierarchicalDataTemplate DataType="{x:Type Logic:StatementPage}"
                              ItemsSource="{Binding Path=Children}">
                    <WrapPanel>
                        <TextBlock Text="Page: "/>
                        <TextBlock Text="{Binding PageIndex}"/>
                    </WrapPanel>
                </HierarchicalDataTemplate>

                <DataTemplate DataType="{x:Type Logic:StatementFund}">
                    <Border  HorizontalAlignment="Left" VerticalAlignment="Top" BorderBrush="Black" BorderThickness="2" CornerRadius="25">
                        <WrapPanel Margin="30 0 30 0" Width="150" Height="150" >
                            <StackPanel>
                                <TextBlock Text="Fund"/>
                                <WrapPanel>
                                    <TextBlock Text="Fund: "/>
                                    <TextBlock Text="{Binding FundNumber}"/>
                                </WrapPanel>
                                <WrapPanel Margin="10 0 0 0">
                                    <TextBlock Text="{Binding ColumnIndex}"/>
                                </WrapPanel>
                            </StackPanel>
                        </WrapPanel>
                    </Border>
                </DataTemplate>
                <DataTemplate DataType="{x:Type Logic:StatementPreviousCycle}">
                    <Border  HorizontalAlignment="Left" VerticalAlignment="Top" BorderBrush="Black" BorderThickness="2" CornerRadius="25">
                        <WrapPanel Margin="30 0 30 0" Width="150" Height="150" >
                            <StackPanel>
                                <TextBlock Text="Previous Cycle"/>
                                <WrapPanel>
                                    <TextBlock Text="Fund: "/>
                                    <TextBlock Text="{Binding FundNumber}"/>
                                </WrapPanel>
                                <WrapPanel Margin="10 0 0 0">
                                    <TextBlock Text="{Binding ColumnIndex}"/>
                                </WrapPanel>
                            </StackPanel>
                        </WrapPanel>
                    </Border>
                </DataTemplate>

            </TreeView.Resources>
        </TreeView>