Windows Phone 7 - TextBlock Font style is changing when i give into the button content - xaml

Question

I want to add the TextBlock into the Button content. But if i add the TextBlock into the button content the TextBlock font style is changing.
<StackPanel HorizontalAlignment="Center" VerticalAlignment="Top">
<TextBlock Text="Vijaya dhas" FontSize="36" FontWeight="Black"/>
<TextBlock Text="Mobile App Developer Trainee" FontSize="26" FontWeight="SemiBold"/>
<TextBlock Text="Chennai" FontSize="24" FontWeight="Medium"/>
</StackPanel>
If i give like this my out put is:
If I give this into the button content:
<Button Height="200">
<Button.Content>
<StackPanel>
<TextBlock Text="Vijaya dhas" FontSize="36" FontWeight="Black"/>
<TextBlock Text="Mobile App Developer Trainee" FontSize="26" FontWeight="SemiBold"/>
<TextBlock Text="Chennai" FontSize="24" FontWeight="Medium"/>
</StackPanel>
</Button.Content>
</Button>
the out put is:
I don't want change the TextBlock font style. Please give any idea to keep the font style what ever it is.
Here i have attached my list box example for your review:
Without Using Button:
Using Button Content:
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock x:Name="ApplicationTitle" Text="List Example" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="PageTitle" Text="Example" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="2,0,2,0" Background="#FFE5E5E5">
<TextBlock Text="List Box With Button Content" Margin="0,150,0,0" FontSize="26" Foreground="Red" VerticalAlignment="Top" />
<ListBox HorizontalAlignment="Left" Margin="0,180,0,0" Name="listBox1" VerticalAlignment="Top" Width="480" ItemsSource="{Binding Content, Mode=TwoWay}">
<ListBox.ItemTemplate>
<DataTemplate>
<Button BorderBrush="Transparent" Template="{x:Null}">
<Button.Content>
<Border Margin="0,0,0,0" BorderThickness="1" BorderBrush="Gray" Padding="1" Width="476">
<StackPanel Orientation="Horizontal">
<Border Height="110" Width="110" Margin="5,0,0,0" BorderThickness="1" BorderBrush="Black">
<StackPanel Height="110" Width="110" Background="White">
<Image Source="/NewExample;component/Images/Koala.jpg" Stretch="Fill" Width="100" Height="100" Margin="0,0,0,0"/>
<Image Source="{Binding ImageView}" Stretch="Fill" Width="110" Height="110" Margin="0,-100,0,0"/>
</StackPanel>
</Border>
<TextBlock Text="{Binding TitleView}" Height="30" Width="230" Foreground="Black" Margin="10,0,0,0" TextWrapping="Wrap" FontWeight="Medium" FontSize="24" VerticalAlignment="Top"/>
<TextBlock Text="{Binding Time}" Width="100" Foreground="Black" Margin="30,0,0,0" FontSize="18"/>
<TextBlock Text="{Binding TypeViews}" Width="250" Foreground="Black" Margin="-360,30,0,0" FontSize="18" FontWeight="Medium" HorizontalAlignment="Left" />
<TextBlock Text="{Binding TextContent}" MaxHeight="84" Width="270" TextWrapping="Wrap" Foreground="Black" Margin="-450,50,0,0" FontWeight="Black" FontSize="19" TextTrimming="WordEllipsis" />
<Image Source="{Binding TypeImageView}" Height="35" Width="35" Stretch="Fill" Margin="-120,10,0,0"/>
<Image Width="50" Height="50" Source="{Binding ClickButton}" Stretch="Fill" Margin="-60,10,0,0" Name="balloon_disclosure"/>
<TextBlock Text="{Binding TextView}" Width="250" Foreground="Black" Margin="-360,100,0,0" FontSize="20" FontWeight="Medium" HorizontalAlignment="Left" />
</StackPanel>
</Border>
</Button.Content>
</Button>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
</Grid>

Answer 1

To Get rid of the button's default padding, margin and styles etc, set its template to "{x:Null}"
<Button Height="200" Template="{x:Null}">
<Button.Content>
<StackPanel>
<TextBlock Text="Vijaya dhas" FontSize="36" FontWeight="Black"/>
<TextBlock Text="Mobile App Developer Trainee" FontSize="26" FontWeight="SemiBold"/>
<TextBlock Text="Chennai" FontSize="24" FontWeight="Medium"/>
</StackPanel>
</Button.Content>
</Button>