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Custom Title bar in all windows of WPF app

I have custom title bar for all windows of my application.
I want to create a template that I can use many times on different windows or on Message Box
I am thinking what is the best practice to achieve this.
At the moment I have a title bar but it is hard coded in every window.
This is an example of one of the windows
<Window x:Class="MyApp.Configuration.Windows.NotMainWindow"
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"
Title="Some text"
Height="113.868" Width="405.84"
Background="#FFE5E5E5"
WindowStyle="None"
>
<WindowChrome.WindowChrome>
<WindowChrome CaptionHeight="34" />
</WindowChrome.WindowChrome>
<Window.Resources>
<ResourceDictionary Source="pack://application:,,,/somefolder.somefolder;component/Resources/TitleBarIconsStyle.xaml" />
</Window.Resources>
<Border x:Name="MainWindowBorder" BorderThickness="0" >
<Grid x:Name="parentContainer">
<Grid.RowDefinitions>
<RowDefinition Height ="Auto"/>
<RowDefinition Height ="*"/>
</Grid.RowDefinitions>
<!--Window chrome-->
<Grid Grid.Row="0" Height="30" Background="#585856">
<StackPanel Orientation="Horizontal" HorizontalAlignment="Left" VerticalAlignment="Center">
<!--App icon-->
<Image Source="/Resources/icon.png" Width="18" Margin="2" HorizontalAlignment="Left" VerticalAlignment="Center" />
<TextBlock FontFamily="Arial" Margin="4 3 0 0" Text="Some text"/>
</StackPanel>
<!--Caption buttons-->
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right" >
<Button Style="{StaticResource MinimizeButtonStyle}" WindowChrome.IsHitTestVisibleInChrome="True" ToolTip="Minimize"
Click="CommandBinding_Executed_Minimize"/>
<Button x:Name="RestoreButton" Visibility="Collapsed" Style="{StaticResource RestoreButtonStyle}"
Click="CommandBinding_Executed_Restore" WindowChrome.IsHitTestVisibleInChrome="True" ToolTip="Restore"/>
<Button x:Name="MaximizeButton" Visibility="Visible" Style="{StaticResource MaximizeButtonStyle}"
Click="CommandBinding_Executed_Maximize" WindowChrome.IsHitTestVisibleInChrome="True" ToolTip="Maximize" />
<Button x:Name="CloseButton" Style="{StaticResource CloseButtonStyle}" WindowChrome.IsHitTestVisibleInChrome="True" ToolTip="Close"
Click="CommandBinding_Executed_Close"/>
</StackPanel>
</Grid>
<Grid Grid.Row="1">
<TextBox x:Name="Input"/>
<Button x:Name="OkButton"
Content="Ok"/>
</Grid>
</Grid>
</Border>
</Window>

Based on this MSDN document , you can not customize (like change colors and add your icons) windows title bar in WPF App.
the solution is create your custom title bar style and set WindowStyle="None" in <Window/> tag.
There one custom title bar in my WPF app :
<Grid FlowDirection="RightToLeft">
<Grid.RowDefinitions>
<RowDefinition Height="25*"/>
</Grid.RowDefinitions>
<StackPanel Margin="0 0 5 0" Orientation="Horizontal" Background="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}" Grid.Row="0" Grid.Column="6" Grid.ColumnSpan="2" FlowDirection="LeftToRight">
<Button x:Name="btnCloseApp" IsEnabled="True" Margin="0 0 4 0" ToolTip="Exit" Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Height="25" Width="25" Background="{x:Null}" BorderBrush="{x:Null}" Foreground="DodgerBlue" Click="btnCloseApp_Click">
<materialDesign:PackIcon Kind="Shutdown" Height="20" Width="20"/>
</Button>
<Button x:Name="btnMinimizeApp" IsEnabled="True" ToolTip="Minimize" Style="{StaticResource MaterialDesignFloatingActionMiniAccentButton}" Height="25" Width="25" Background="{x:Null}" BorderBrush="{x:Null}" Foreground="DodgerBlue" Click="btnMiniApp_Click">
<materialDesign:PackIcon Kind="WindowMinimize" Height="20" Width="20"/>
</Button>
</StackPanel>
</Grid>
and in picture :
Again don't forget to set WindowStyle="None"

Binding in WPF not propagating into usercontrol

I am new and learning WPF. I am making a demo project to learn the working of binding and dependency properties. To make it easy to understand I briefly explain this project. In solution, I have three projects. Two projects are user control and one is the main application.
This is user control for the child page
<UserControl x:Class="DefectTracking.DefectTrace"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="1200"
Grid.IsSharedSizeScope="True"
Loaded="ElementGeladen"
Name="Self">
<UserControl.Resources>
<ResourceDictionary Source="Resources.xaml" />
</UserControl.Resources>
<UserControl.Style>
<Style TargetType="{x:Type UserControl}">
<Setter Property="Background" Value="{StaticResource Hintergrundfarbe}"/>
</Style>
</UserControl.Style>
<Grid DataContext="{Binding ElementName=Self}" Margin="4">
<FrameworkElement x:Name="ProxyElement"/>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition/>
</Grid.RowDefinitions>
<!--#region Kopfzeile -->
<Grid Grid.Row="0">
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="Ergebnisse"/>
<ColumnDefinition SharedSizeGroup="Name"/>
<ColumnDefinition SharedSizeGroup="Folgefehler" Width="*"/>
<ColumnDefinition SharedSizeGroup="Fehler"/>
<ColumnDefinition SharedSizeGroup="Aktiviert"/>
</Grid.ColumnDefinitions>
<TextBox Grid.Column="2" Style="{StaticResource FolgefehlerStil}" Text="FF" />
<TextBox Grid.Column="3" Style="{StaticResource FehlerStil}" Text="Fehler"/>
<TextBox Grid.Column="4" Style="{StaticResource FehlerStil}" Text="Aktiviert"/>
</Grid>
<!--#endregion-->
<!--#region Prüfung -->
<ItemsControl Grid.Row="1" ItemsSource="{Binding Prüfungen}" Name="Prüfungselement">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid Background="Black">
<Grid.ColumnDefinitions>
<ColumnDefinition SharedSizeGroup="Ergebnisse"/>
<ColumnDefinition SharedSizeGroup="Name"/>
<ColumnDefinition SharedSizeGroup="Folgefehler"/>
<ColumnDefinition SharedSizeGroup="Fehler"/>
<ColumnDefinition SharedSizeGroup="Aktiviert"/>
</Grid.ColumnDefinitions>
<!--#region Ergebnisse -->
<ItemsControl Grid.Column="0" ItemsSource="{Binding Ergebnisse}" Style="{StaticResource ErgebnisStil}" Background="Black" MouseDoubleClick="ItemsControl_MouseDoubleClick">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<DockPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
<!--#endregion-->
<!--#region Tabelle -->
<TextBox Grid.Column="1" Margin="10,0" MinWidth="50" Text="{Binding Path=Name}" Style="{StaticResource PrüfungsnameStil}"/>
<TextBox Grid.Column="2" MinWidth="40" Text="{Binding Path=Folgefehler}" Style="{StaticResource FolgefehlerStil}"/>
<TextBox Grid.Column="3" MinWidth="60" Text="{Binding Path=Fehler}" Style="{StaticResource FehlerStil}" IsReadOnly="True"/>
<CheckBox Grid.Column="4" MinWidth="40" IsChecked="{Binding Status, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="5,0,0,0"/>
<!--#endregion-->
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<!--#endregion-->
</Grid>
<!--#region Folgefehlerschieber -->
<Canvas>
<Thumb DragDelta="LinealVerschieben" Canvas.Left="450" Canvas.Top="0">
<Thumb.Template>
<ControlTemplate>
<Grid>
<Line X1="0" Y1="0" X2="0"
Y2="{Binding ActualHeight, Source={x:Reference ProxyElement}}"
Canvas.ZIndex="2"
Style="{StaticResource LinealStil}" Cursor="Hand">
</Line>
<Rectangle Width="11" Margin="0,0,20,0"
Height="{Binding ActualHeight, Source={x:Reference ProxyElement}}"
Style="{StaticResource AnfasserStil}" Cursor="Hand">
<Rectangle.RenderTransform>
<TranslateTransform X="-5" Y="0"/>
</Rectangle.RenderTransform>
</Rectangle>
<Label Style="{StaticResource LabelStil}" Content="{Binding Linealposition}"/>
</Grid>
</ControlTemplate>
</Thumb.Template>
</Thumb>
</Canvas>
<!--#endregion-->
</Grid>
</UserControl>
I am just testing
<CheckBox Grid.Column="4" MinWidth="40" IsChecked="{Binding Status, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="5,0,0,0"/>
This is the user control for the child page
<UserControl x:Class="Demo.View.Dashboard"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Demo.View"
xmlns:vm="clr-namespace:Demo.ViewModel"
xmlns:dt="clr-namespace:DefectTracking;assembly=DefectTrackingControl"
mc:Ignorable="d"
d:DesignHeight="900" d:DesignWidth="1600"
>
<UserControl.DataContext>
<vm:DashboardViewModel/>
</UserControl.DataContext>
<UserControl.Resources>
<vm:BindingProxy x:Key="proxy" Data="{Binding}"/>
<dt:Prüfung x:Key="www"/>
</UserControl.Resources>
<Grid Background="White">
<dt:DefectTrace Margin="0,0,-321,-91">
<dt:DefectTrace.Prüfungen>
<dt:Prüfung
Status="{Binding Path=status}" />
<dt:Prüfung Name="Stabseite" />
<dt:Prüfung Name="Stosskappe" />
<dt:Prüfung Name="Druckbild"
/>
<dt:Prüfung Name="Oberfläche"
/>
</dt:DefectTrace.Prüfungen>
</dt:DefectTrace>
<CheckBox IsChecked="{Binding state, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="100,100,100,10">Test check box</CheckBox>
</Grid>
</UserControl>
Property definition which I want to bind with checkbox but it's not propagating into a user control. If I just set true and false then it works but if I bind then it doesn't work.
Any help would be highly appreciated

I believe the problem here is
<UserControl.DataContext>
<vm:DashboardViewModel/>
</UserControl.DataContext>
because that basically means using a new instance of DashboardViewModel for this particular view, so I would assume that in your code somewhere you are using a different instance of this view model in which changing the value of Status does not really matter.
If the reason is what I think it is and you want to enhance your user comfort while developing XAML files and using this to help the compiler to know the types you can use the d:DataContext something like:
d:DataContext={x:Type vm:DashboardViewModel}

cant get Xaml to tab between TextBoxes

I am trying to get my view to only tab between a pick username textbox and a massage textbox xaml. My first problem is the tab gets stuck on the enter username, my guess is it has a custom control for search suggestions that is next in line. Also it tabs through every button in the view and i don't want it to do that. I have tried to add a Tabindex to both textboxes and it has no effect. I left the Tabidex in both textboxs so you know which ones I am trying to tab between.
<UserControl x:Class="Clinical.Patient.Views.SendMessageDialogView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-
compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
d:DataContext="{d:DesignInstance
Type=viewModels:SendMessageDialogViewModel}"
mc:Ignorable="d"
d:DesignWidth="320"
xmlns:properties="clr-namespace:Clinical.Patient.Properties"
xmlns:viewModels="clr-namespace:Clinical.Patient.ViewModels"
xmlns:patient="clr-namespace:Clinical.Patient"
xmlns:self="clr-namespace:System;assembly=mscorlib"
xmlns:views="clr-namespace:Clinical.Patient.Views"
d:DesignHeight="350"
xmlns:termAutoComplete="clr-
namespace:Clinical.Patient.Controls.TermAutoComplete"
xmlns:controls="clr-namespace:Clinical.Patient.Controls"
KeyboardNavigation.TabNavigation="Local">
<UserControl.Resources>
<viewModels:IsAtLeastGradeConverter x:Key="IsAtLeastGradeConverter"/>
<viewModels:IsAtLeastAutoCloseGradeConverter x:Key="IsAtLeastAutoCloseGradeConverter"/>
</UserControl.Resources>
<Border Padding="8"
MinWidth="320"
ClipToBounds="False">
<Border BorderThickness="1"
BorderBrush="{DynamicResource FocusBorderBrush}"
CornerRadius="2"
Background="{DynamicResource FocusBackgroundBrush}">
<Border.Effect>
<DropShadowEffect Color="{DynamicResource SubtleDivideBorderColor}"
Opacity="1"
ShadowDepth="0"
BlurRadius="10" />
</Border.Effect>
<StackPanel Orientation="Vertical"
Margin="10">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0"
HorizontalAlignment="Left"
VerticalAlignment="Center"
Text="{x:Static properties:Strings.SharingReportIs}"
Foreground="{DynamicResource CommonTextBrush}"
FontSize="13"
FontWeight="Bold"/>
<Border Grid.Column="1"
Width="180"
Margin="5 5 20 5"
HorizontalAlignment="Left"
Background="{DynamicResource FocusBackgroundBrush}"
BorderBrush="{DynamicResource FocusBorderBrush}"
BorderThickness=".5"
CornerRadius="8,8,8,8">
<DockPanel HorizontalAlignment="Center">
<views:ExamTypeIconView DockPanel.Dock="Left"
Type="{Binding ExamType}"
Foreground="{DynamicResource CommonTextBrush}"
IconHeight="30"/>
<StackPanel DockPanel.Dock="Left"
Margin="3">
<TextBlock Text="{Binding Status}"
Foreground="{DynamicResource CommonTextBrush}"
FontSize="13"/>
<TextBlock Text="{Binding Accession}"
Foreground="{DynamicResource CommonTextBrush}"
FontSize="13"/>
</StackPanel>
</DockPanel>
</Border>
</Grid>
<DockPanel HorizontalAlignment="Left"
MinWidth="280"
Margin="0 5 0 0">
<Button
x:Name="To"
HorizontalAlignment="Right"
MinWidth="65"
Margin="0,4,4,4"
IsDefault="True"
Command="{Binding ToCommand}"
Content="to.." Width="65" />
<TextBox x:Name="SendTo"
Text="{Binding Recipient, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"
Style="{DynamicResource NavigationSearchTextBox}"
FontSize="{DynamicResource OneAndAQuarterFontSize}"
Padding="0 3 0 3"
VerticalAlignment="Center"
Width="225"
TabIndex="0"/>
<termAutoComplete:TermAutoComplete AutoCompleteSource="{Binding AutoCompleteSource}"
Padding="0 0 0 0"
TextBox="{Binding ElementName=SendTo}"/>
</DockPanel>
<Grid Margin="0 5 0 0">
<TextBlock Text="{x:Static properties:Strings.SharingMessage}"
Foreground="{DynamicResource CommonTextBrush}"
FontSize="13"
FontWeight="Bold" />
</Grid>
<TextBox x:Name="PeerReviewComments"
Margin="0 5 0 0"
MinLines="5"
AcceptsReturn="True"
TextWrapping="Wrap"
Text="{Binding Message, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
Width="295"
TabIndex="1"/>
<DockPanel
MinWidth="280"
Margin="0,5,-5,0"
>
<Button
x:Name="Save"
HorizontalAlignment="Right"enter code here
MinWidth="65"
Margin="0,4,4,4"
IsDefault="True"
Command="{Binding SendCommand}"
Content="Send" Width="65"
DockPanel.Dock="Right"
/>
<Button
x:Name="Cancle"
HorizontalAlignment="Right"
MinWidth="65"
Margin="0,4,4,4"
IsDefault="True"
Command="{Binding CancelCommand}"
Content="Cancel" Width="65"
DockPanel.Dock="Right"
/>
</DockPanel>
</StackPanel>
</Border>
</Border>
</UserControl>

I believe you need to replace "TabIndex" with "KeyboardNavigation.TabIndex".
If that doesn't work, you can also skip elements in the tab sequence by setting KeyboardNavigation.IsTabStop on the element in XAML.
KeyboardNavigation.IsTabStop="False"
Source

For controls where tab "gets stuck" add:
KeyboardNavigation.TabNavigation="Continue"
To avoid tab hitting a control add:
KeyboardNavigation.IsTabStop="False"

This Xaml is not valid... I don't understand why

I've a strange problem with xaml.
Visual studio for wp tell me that the xaml is not valid but when I execute the app it works fine.
<phone:PhoneApplicationPage
x:Class="Friends_And_Money.ContList"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Friends_And_Money"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
mc:Ignorable="d"
shell:SystemTray.IsVisible="True">
<!--LayoutRoot è la griglia radice in cui viene inserito tutto il contenuto della pagina-->
<phone:PhoneApplicationPage.Resources>
<local:ContactPictureConverter x:Key="ImageConverter" />
<DataTemplate x:Key="AddrBookGroupHeaderTemplate">
<Border Background="Transparent" Padding="5">
<Border Background="{StaticResource PhoneAccentBrush}" BorderBrush="{StaticResource PhoneAccentBrush}" BorderThickness="2" Width="62"
Height="62" Margin="0,0,18,0" HorizontalAlignment="Left">
<TextBlock Text="{Binding Key}" Foreground="{StaticResource PhoneForegroundBrush}" FontSize="48" Padding="6"
FontFamily="{StaticResource PhoneFontFamilySemiLight}" HorizontalAlignment="Left" VerticalAlignment="Center"/>
</Border>
</Border>
</DataTemplate>
<phone:JumpListItemBackgroundConverter x:Key="BackgroundConverter"/>
<phone:JumpListItemForegroundConverter x:Key="ForegroundConverter"/>
<Style x:Key="AddrBookJumpListStyle" TargetType="phone:LongListSelector">
<Setter Property="GridCellSize" Value="113,113"/>
<Setter Property="LayoutMode" Value="Grid" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<Border Background="{Binding Converter={StaticResource BackgroundConverter}}" Width="113" Height="113" Margin="6" >
<TextBlock Text="{Binding Key}" FontFamily="{StaticResource PhoneFontFamilySemiBold}" FontSize="48" Padding="6"
Foreground="{Binding Converter={StaticResource ForegroundConverter}}" VerticalAlignment="Center"/>
</Border>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
<DataTemplate x:Key="AddrBookItemTemplate">
<StackPanel VerticalAlignment="Top" Margin="0,5,0,5">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="5" ></ColumnDefinition>
<ColumnDefinition Width="auto" ></ColumnDefinition>
<ColumnDefinition Width="5" ></ColumnDefinition>
<ColumnDefinition Width="auto" ></ColumnDefinition>
</Grid.ColumnDefinitions>
<Image Source="{Binding Photo, Converter={StaticResource ImageConverter}}" Grid.Column="1" Width="62" Height="62" Stretch="Fill" />
<TextBlock Grid.Column="3" FontWeight="Light" FontSize="40" Text="{Binding FirstName}" />
</Grid>
</StackPanel>
</DataTemplate>
</phone:PhoneApplicationPage.Resources>
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contiene il nome dell'applicazione e il titolo della pagina-->
<StackPanel Grid.Row="0" Margin="12,17,0,28">
<TextBlock Text="{Binding Path=LocalizedResources.ApplicationTitle, Source={StaticResource LocalizedStrings}}" Style="{StaticResource PhoneTextNormalStyle}" Margin="12,0"/>
<TextBlock Text="{Binding Path=LocalizedResources.ContactTitle, Source={StaticResource LocalizedStrings}}" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<!--ContentPanel - inserire ulteriore contenuto qui-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<phone:LongListSelector x:Name="LongList"
Background="Transparent"
GroupHeaderTemplate="{StaticResource AddrBookGroupHeaderTemplate}"
ItemTemplate="{StaticResource AddrBookItemTemplate}"
JumpListStyle="{StaticResource AddrBookJumpListStyle}"
LayoutMode="List"
IsGroupingEnabled="true"
HideEmptyGroups ="true" />
</Grid>
</Grid>
</phone:PhoneApplicationPage>
I've followed the tutorial (with the difference of a longlistselector) from here : [http://msdn.microsoft.com/en-us/library/windowsphone/develop/hh286418(v=vs.105).aspx][1]
How I say all works fine, longlistselector show me images and contact's name.
Struct to show:
namespace Friends_And_Money
{
class ContactStruct
{
public string FirstName
{
get;
set;
}
public WriteableBitmap Photo
{
get;
set;
}
public ContactStruct(string name, WriteableBitmap photo)
{
this.FirstName = name;
this.Photo = photo;
}
}
}
Thanks to every one that help.
New details:
The error is signed in datatemplate AddrBookItemTemplate and I've noted that if I leave image source attribute the error disappear.
So seems be something with the binding.

Visual studio for wp tell me that the xaml is not valid but when I execute the app it works fine.
Please ignore the designer. It's rather moody.

It's maybe a bad copy / paste, but your first element (<phone:PhoneApplicationPage>) is not close.

AG_E_PARSER_BAD_PROPERTY_VALUE (Line 7;Position 51)

This is my XAML code in my project, in this first i display MainListBox then display ChatListBox depending on user selection. When user select to chat then i got run time Xaml parseing exception.
this is my whole Xaml code...
<phone:PhoneApplicationPage
x:Class="DocomoMessenger.View.Buddies"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
mc:Ignorable="d" d:DesignHeight="768" d:DesignWidth="480"
shell:SystemTray.IsVisible="True" Loaded="PhoneApplicationPage_Loaded">
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="126"/>
<RowDefinition Height="580*"/>
<RowDefinition Height="75"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="2,2,0,2">
<ProgressBar Height="3" Name="waitprogess" Margin="0,2,0,0" />
<TextBlock x:Name="txtload" Style="{StaticResource PhoneTextNormalStyle}" Margin="12,5,12,0" />
<TextBlock x:Name="PageTitle" Text="page name" Margin="1,0,0,0" Style="{StaticResource PhoneTextTitle1Style}" HorizontalAlignment="Center" />
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="2,0,2,0">
<Border BorderThickness="5" BorderBrush="DarkGray" CornerRadius="10" Name="buddyborder">
<ListBox x:Name="MainListBox" >
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Height="100" >
<Grid.ColumnDefinitions>
<ColumnDefinition Width="50"/>
<ColumnDefinition Width="*"/>
<ColumnDefinition Width="50"/>
</Grid.ColumnDefinitions>
<Image Grid.Column="0" Source="{Binding IM}" Stretch="Fill" Width="50" Height="50" VerticalAlignment="Center" HorizontalAlignment="Center" ></Image>
<StackPanel Margin="1,4,0,0" Grid.Column="1" x:Name="details" Height="100">
<TextBlock Text="{Binding Name}" Style="{StaticResource PhoneTextNormalStyle}" Foreground="Brown" Padding="10"/>
<TextBlock Text="{Binding StatusMsg}" FontSize="{StaticResource PhoneFontSizeSmall}" TextWrapping="Wrap" Padding="10" />
</StackPanel>
<Image Tag="{Binding Name}" Source="{Binding IMChat}" Grid.Column="2" Stretch="Uniform" Width="40" Height="40" VerticalAlignment="Center" HorizontalAlignment="Center" Name="imgchat" MouseLeftButtonUp="imgchat_MouseLeftButtonUp"></Image>
<Line Stretch="UniformToFill" Grid.ColumnSpan="3" Stroke="DarkGray" StrokeThickness="2" Margin="0,10,0,0" X1="10" Y1="10" Y2="10" VerticalAlignment="Bottom" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Border>
<ListBox x:Name="ChatListBox" Margin="2,2,0,0" Opacity="1" Visibility="Collapsed" >
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Name="megrid" Margin="3,5,0,0">
<Grid.RowDefinitions>
<RowDefinition Height="40*"/>
<RowDefinition Height="40"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="{Binding FirstCol}"/>
<ColumnDefinition Width="20"/>
<ColumnDefinition Width="{Binding LastCol}"/>
</Grid.ColumnDefinitions>
<Image Name="imgbud" Source="{Binding IM}" Grid.Column="{Binding ImgCol}" Grid.Row="1" Stretch="Uniform" Width="50" Height="50"/>
<Rectangle Grid.RowSpan="2" RadiusY="20" RadiusX="20" Grid.Column="{Binding RectCol}" Fill="{Binding Bru}" />
<TextBlock Text="{Binding Name}" Grid.Row="0" TextWrapping="Wrap" Grid.Column="{Binding RectCol}" Padding="10" />
<TextBlock Text="{Binding Time}" Grid.Row="1" Grid.Column="{Binding RectCol}" Padding="10" />
<Path Data="{Binding Obj}" Fill="{Binding Bru}" Margin="0,0,-5,0" HorizontalAlignment="{Binding HorAlig}" Grid.Row="1" Grid.Column="1" VerticalAlignment="Center" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
<Grid x:Name="sendmsg" Height="75" VerticalAlignment="Bottom" Grid.Row="2" Visibility="Collapsed">
<TextBox Name="txtmsg" Text="type" Padding="5" Opacity="0.8" MouseLeftButtonUp="txtmsg_MouseLeftButtonUp" Width="370" HorizontalAlignment="Left" />
<Image Name="imgsend" Width="100" Height="46" Source="/DocomoMessenger;component/Themes/send.png" HorizontalAlignment="Right" Stretch="UniformToFill" Margin="0,12,4,17" MouseLeftButtonUp="imgsend_MouseLeftButtonUp"/>
</Grid>
</Grid>
<!--Sample code showing usage of ApplicationBar-->
<!--<phone:PhoneApplicationPage.ApplicationBar>
<shell:ApplicationBar IsVisible="True" IsMenuEnabled="True">
<shell:ApplicationBarIconButton IconUri="/Images/appbar_button1.png" Text="Button 1"/>
<shell:ApplicationBarIconButton IconUri="/Images/appbar_button2.png" Text="Button 2"/>
<shell:ApplicationBar.MenuItems>
<shell:ApplicationBarMenuItem Text="MenuItem 1"/>
<shell:ApplicationBarMenuItem Text="MenuItem 2"/>
</shell:ApplicationBar.MenuItems>
</shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>-->
when I run this code i got following XamlParsinException error.
Anyone help me.
Thanks in Advance
Pavan.

I can't pin it down, it is a nearly generic message that doesn't say much.
Here is what I would do:
Comment out all content so you are left with <PhoneApplicationPage ...>
Comment out all C# code that depends on the XAML you just commented out
Make sure the application compiles.
Now slowly, step by step, add xaml elements back in. Until you find the offending line.
If 4. is too hard you could reverse this trick; comment out part by part.

whats in your PhoneApplicationPage_Loaded method?
apart from a missing end tag
</phone:PhoneApplicationPage>
in your snippet above I was able to build and run this in WP7 7.1. I did have to omit your Loaded and MouseLeftButtonUp refers though as I don't have your full code.