<Grid>
            <Grid.Resources>
                <ContextMenu x:Key="MyContextMenu">
                    <MenuItem Header="Expand"  Click="ExpandMainTreeViewButton_Click"  >                        
                        <MenuItem.Icon>
                            <Image Source="/Icon;component/Resources/13.png" Width="16"/>
                        </MenuItem.Icon>
                    </MenuItem>
                    <MenuItem Header="Collapse"  Click="CollapseMainTreeViewButton_Click" >
                        <MenuItem.Icon>
                            <Image Source="/Icon;component/Resources/12.png" Width="16"/>
                        </MenuItem.Icon>
                    </MenuItem>
                    <MenuItem Header="Refresh"  Click="RefreshButton_Click" >
                        <MenuItem.Icon>
                        <Image Source="/Icon;component/Resources/61.png" Width="16"/>
                        </MenuItem.Icon>
                    </MenuItem>
                </ContextMenu>
            </Grid.Resources>
            
            <Grid.RowDefinitions>
                <RowDefinition Height="30"/>
                <RowDefinition Height="*" />
            </Grid.RowDefinitions>

            <ToolBar Grid.Row="0"
                             Height="30" HorizontalAlignment="Stretch" 
                             Name="leftToolbar" 
                             VerticalAlignment="Top"   Band="1" 
                             BandIndex="1"
                            >
                <ToolBar.ItemsSource>
                    <CompositeCollection>
                        <CollectionContainer Collection="{Binding Path=Items, Source={StaticResource ResourceKey=MyContextMenu}}"/>
                    </CompositeCollection>
                </ToolBar.ItemsSource>
                <ToolBar.ItemTemplate>
                    <DataTemplate>
                        <Button Content="{Binding Path=Header}" Width="20"/>
                    </DataTemplate>
                </ToolBar.ItemTemplate>

                       </ToolBar>


            <!-- Pannello TreeView di sinistra -->
            <Grid Grid.Row="1">

                <TreeView Name="MainTreeView" ItemsSource="{Binding}" SelectedItemChanged="MainTreeView_SelectedItemChanged" >
                    <TreeView.Resources>
                        <Style TargetType="{x:Type TreeViewItem}">
                            <Setter Property="ContextMenu" Value="{StaticResource ResourceKey=MyContextMenu}" />
                        </Style>
                        <HierarchicalDataTemplate  ItemsSource="{Binding MY}" DataType="{x:Type entities:MYEntity}">   
                            <StackPanel Orientation="Horizontal">
                                <Image Width="16" Height="16" Source="/Icon;component/Resources/190.png"></Image>
                                <TextBlock 
                                       Text="{Binding Path=Description}" 
                                       VerticalAlignment="Center"
                                       />
                        </StackPanel>   
                        </HierarchicalDataTemplate>

                        <DataTemplate DataType="{x:Type entities:MYEntity}" >                          
                            <StackPanel Orientation="Horizontal">
                               <TextBlock Text="{Binding Path=Description}" 
                                       VerticalAlignment="Center"/>
                            </StackPanel>
                           

                        </DataTemplate>
                    </TreeView.Resources> 
                   
                </TreeView>
            </Grid>