Salve ho creato un menu non capisco perchè ,se apro e chiudo i sottomenu, quando poi cerco di chiudere la form devo cliccare due volte sulla x prima che si chiuda. Potete aiutarmi?
Posto il codice:

<Window x:Class="cookinfamily.Menu"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Menu" Height="70" Width="440" Loaded="Window_Loaded" >
<DockPanel LastChildFill="True">
<Menu DockPanel.Dock="Left" TabIndex="1"
VerticalAlignment="Stretch" Width="420" Name="Prova" IsMainMenu="True" MouseLeave="Menu_MouseLeave">
<Menu.Resources>
<Style x:Key="ThemeMenuItemStyle" TargetType="MenuItem" >
<Setter Property="Header" Value="{Binding Name}"></Setter>
<Setter Property="Command" Value="{Binding ActivateCommand}"/>
<Setter Property="Background" Value="AliceBlue" />
<Setter Property="Foreground" Value="SteelBlue"/>
<Setter Property="HeaderStringFormat" Value="Bold"/>
<Setter Property="Width" Value="140"/>
<Setter Property="Height" Value="28"/>
<Setter Property="FontSize" Value="14"/>
<Setter Property="FontStretch" Value="2"/>
<Setter Property="BorderBrush" Value="Ivory"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Padding" Value="10,2,0,0"/>
</Style>

</Menu.Resources>




<MenuItem Header="Mapping" ItemsSource="{Binding Themes}"
Style="{StaticResource ThemeMenuItemStyle}"
MouseEnter="MenuItem_MouseEnter" MouseLeave="MenuItem_MouseLeave" >

<MenuItem.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</MenuItem.ItemsPanel>
<MenuItem Header="_New" IsCheckable="true"/>
<MenuItem Header="_Open" IsCheckable="true"/>
<MenuItem Header="_Close" IsCheckable="true"/>
<Separator/>
<MenuItem Header="Menu with Submenu">
<MenuItem Header="_submenuitem1" IsCheckable="true"/>
<MenuItem Header="_submenuitem2" IsCheckable="true">
<MenuItem Header="_submenuitem2.1" IsCheckable="true"/>
</MenuItem>
</MenuItem>
</MenuItem>
<MenuItem Header="Cucina" ItemsSource="{Binding Themes}"
Style="{StaticResource ThemeMenuItemStyle}"
MouseEnter="MenuItem_MouseEnter" MouseLeave="MenuItem_MouseLeave">
<MenuItem.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</MenuItem.ItemsPanel>
<MenuItem Header="_New" IsCheckable="true"/>
<MenuItem Header="_Open" IsCheckable="true"/>
<MenuItem Header="_Close" IsCheckable="true"/>
<Separator/>
<MenuItem Header="Menu with Submenu">
<MenuItem Header="_submenuitem1" IsCheckable="true"/>
<MenuItem Header="_submenuitem2" IsCheckable="true">
<MenuItem Header="_submenuitem2.1" IsCheckable="true"/>
</MenuItem>
</MenuItem>
</MenuItem>
<MenuItem Header="Struttura" ItemsSource="{Binding Themes}"
Style="{StaticResource ThemeMenuItemStyle}"
MouseEnter="MenuItem_MouseEnter" MouseLeave="MenuItem_MouseLeave">
<MenuItem.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</MenuItem.ItemsPanel>
<MenuItem Header="Alimenti" IsCheckable="true"/>
<MenuItem Header="_Open" IsCheckable="true"/>
<MenuItem Header="_Close" IsCheckable="true"/>
<Separator/>
<MenuItem Header="Menu with Submenu">
<MenuItem Header="_submenuitem1" IsCheckable="true"/>
<MenuItem Header="_submenuitem2" IsCheckable="true">
<MenuItem Header="_submenuitem2.1" IsCheckable="true"/>
</MenuItem>
</MenuItem>
</MenuItem>
</Menu>
</DockPanel>
</Window>



private void MenuItem_MouseEnter(object sender, MouseEventArgs e)
{
MenuItem mi = (MenuItem)sender;

if (mi.Role == MenuItemRole.TopLevelHeader) mi.IsSubmenuOpen = true;

}



private void MenuItem_MouseLeave(object sender, MouseEventArgs e)
{
MenuItem mi = (MenuItem)sender;

if (mi.Role == MenuItemRole.TopLevelHeader)
{
mi.IsSubmenuOpen = false;
//Prova.Items.DeferRefresh();
}
}

private void Menu_MouseLeave(object sender, MouseEventArgs e)
{

foreach (MenuItem mi in Prova.Items) mi.IsSubmenuOpen = false;

}

<Window x:Class="cookinfamily.Menu"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Menu" Height="70" Width="440"
ResizeMode="CanResizeWithGrip"
Loaded="Window_Loaded">
<DockPanel LastChildFill="True">
<Menu Name="menu_prog" DockPanel.Dock="Left"
VerticalAlignment="Stretch" Width="420" IsMainMenu="True" MouseLeave="Menu_MouseLeave">
<Menu.Resources>
<Style x:Key="ThemeMenuItemStyle" TargetType="MenuItem" >
<Setter Property="Header" Value="{Binding Name}"></Setter>
<Setter Property="Command" Value="{Binding ActivateCommand}"/>
<Setter Property="Background" Value="AliceBlue" />
<Setter Property="Foreground" Value="SteelBlue"/>
<Setter Property="HeaderStringFormat" Value="Bold"/>
<Setter Property="Width" Value="140"/>
<Setter Property="Height" Value="28"/>
<Setter Property="FontSize" Value="14"/>
<Setter Property="FontStretch" Value="2"/>
<Setter Property="BorderBrush" Value="Ivory"/>
<Setter Property="BorderThickness" Value="1"/>
<Setter Property="Padding" Value="10,2,0,0"/>

</Style>
</Menu.Resources>

<MenuItem Header="Mapping" ItemsSource="{Binding Themes}"
Style="{StaticResource ThemeMenuItemStyle}"
MouseEnter="MenuItem_MouseEnter" MouseLeave="MenuItem_MouseLeave" >

<MenuItem.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</MenuItem.ItemsPanel>
<MenuItem Header="_New" IsCheckable="true"/>
<MenuItem Header="_Open" IsCheckable="true"/>
<MenuItem Header="_Close" IsCheckable="true"/>
<Separator/>
<MenuItem Header="Menu with Submenu">
<MenuItem Header="_submenuitem1" IsCheckable="true"/>
<MenuItem Header="_submenuitem2" IsCheckable="true">
<MenuItem Header="_submenuitem2.1" IsCheckable="true"/>
</MenuItem>
</MenuItem>
</MenuItem>
<MenuItem Header="Cucina" ItemsSource="{Binding Themes}"
Style="{StaticResource ThemeMenuItemStyle}"
MouseEnter="MenuItem_MouseEnter" MouseLeave="MenuItem_MouseLeave">
<MenuItem.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</MenuItem.ItemsPanel>
<MenuItem Header="_New" IsCheckable="true"/>
<MenuItem Header="_Open" IsCheckable="true"/>
<MenuItem Header="_Close" IsCheckable="true"/>
<Separator/>
<MenuItem Header="Menu with Submenu">
<MenuItem Header="_submenuitem1" IsCheckable="true"/>
<MenuItem Header="_submenuitem2" IsCheckable="true">
<MenuItem Header="_submenuitem2.1" IsCheckable="true"/>
</MenuItem>
</MenuItem>
</MenuItem>
<MenuItem Header="Struttura" ItemsSource="{Binding Themes}"
Style="{StaticResource ThemeMenuItemStyle}"
MouseEnter="MenuItem_MouseEnter" MouseLeave="MenuItem_MouseLeave">
<MenuItem.ItemsPanel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</MenuItem.ItemsPanel>
<MenuItem Header="Alimenti" IsCheckable="true"/>
<MenuItem Header="_Open" IsCheckable="true"/>
<MenuItem Header="_Close" IsCheckable="true"/>
<Separator/>
<MenuItem Header="Menu with Submenu">
<MenuItem Header="_submenuitem1" IsCheckable="true"/>
<MenuItem Header="_submenuitem2" IsCheckable="true">
<MenuItem Header="_submenuitem2.1" IsCheckable="true"/>
</MenuItem>
</MenuItem>
</MenuItem>
</Menu>
</DockPanel>

</Window>






using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace cookinfamily
{
/// <summary>
/// Logica di interazione per Menu.xaml
/// </summary>
public partial class Menu : Window
{
public Menu()
{
InitializeComponent();
}

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


private void MenuItem_MouseEnter(object sender, MouseEventArgs e)
{
MenuItem mi = (MenuItem)sender;

if (mi.Role == MenuItemRole.TopLevelHeader) mi.IsSubmenuOpen = true;

}



private void MenuItem_MouseLeave(object sender, MouseEventArgs e)
{
MenuItem mi = (MenuItem)sender;

if (mi.Role == MenuItemRole.TopLevelHeader)
{
mi.IsSubmenuOpen = false;
//Prova.Items.DeferRefresh();
}
}

private void Menu_MouseLeave(object sender, MouseEventArgs e)
{

foreach (MenuItem mi in menu_prog.Items) mi.IsSubmenuOpen = false;

}

}
}

esatto è fastidiosa,grazie intando per l'interessamento, spero non sia un BUG irrisolvibile..

Fantastico, grazie mille, però come al solito i problemi sono sempre infiniti. Ora rimane il problema quando ho una finestra aperta con il menu e sotto una pagina, se passo sul menù e poi torno con il mouse sulla pagina devo anche in questo caso fare il doppio clic prima di poter effettuare un'azione esempio chiudere la stessa. Come posso risolvere in questo caso? ovviamente intanto grazie mille per l'aiuto