Creating a Common Window in WPF

Example1.xml

<ControlTemplate TargetType="Window" x:Key="WindowTemplate">
    <aero:SystemDropShadowCrome CornerRadius="10" Margin="10">
        <Border BorderThickness="1" BorderBrush="Black" Background="White"
                CornerRadius="10">
            <Border Height="40" Background="#01000000" VerticalAlignment="Top"
                    CornerRadius="10,10,0,0" MouseLeftButtonDown="DragWindow">
                <ContentPresenter />
            </Border>
        </Border>
    </aero:SystemDropShadowCrome>
</ControlTemplate>

Example2.cs

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using Microsoft.Windows.Themes;

namespace CommonWindow
{
    public abstract class WindowBase : Window
    {
        public WindowBase()
        {
            Initialized += WindowBaseInitialized;
        }

        private void WindowBaseInitialized( object sender, System.EventArgs e )
        {
            SetResourceReference( Window.StyleProperty, "Window" );
            ResourceDictionary resource = new ResourceDictionary();
            resource.Source = new Uri( "pack://application:,,,/WindowResource.xaml" );
            this.Resources.MergedDictionaries.Add( resource );

            SystemDropShadowChrome dropShadow = new SystemDropShadowChrome();
            dropShadow.SetResourceReference( Control.StyleProperty, "WindowShadow" );

            Border windowBorder = new Border();
            windowBorder.SetResourceReference( Control.StyleProperty, "WindowBorder" );
            dropShadow.Child = windowBorder;

            Grid grid = new Grid();
            grid.RowDefinitions.Add( new RowDefinition() { Height = new GridLength( 40.0 ) } );
            grid.RowDefinitions.Add( new RowDefinition() );
            windowBorder.Child = grid;

            Border headerBorder = new Border();
            headerBorder.SetResourceReference( Control.StyleProperty, "HeaderBorder" );
            headerBorder.MouseLeftButtonDown += DragWindow;
            grid.Children.Add( headerBorder );
            Grid.SetRow( headerBorder, 0 );

            ContentPresenter contentPresenter = new ContentPresenter();
            contentPresenter.Content = this.Content;
            grid.Children.Add( contentPresenter );
            Grid.SetRow( contentPresenter, 1 );

            this.Content = dropShadow;
        }

        private void DragWindow( object sender, MouseButtonEventArgs e )
        {
            DragMove();
        }
    }
}

Example3.xml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:aero="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Aero">

    <Style TargetType="Window" x:Key="Window">
        <Setter Property="AllowsTransparency" Value="True" />
        <Setter Property="WindowStyle" Value="None" />
        <Setter Property="Background" Value="Transparent" />
    </Style>

    <Style TargetType="aero:SystemDropShadowChrome" x:Key="WindowShadow">
        <Setter Property="CornerRadius" Value="10" />
        <Setter Property="Margin" Value="10" />
    </Style>

    <Style TargetType="Border" x:Key="WindowBorder">
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="BorderBrush" Value="Black" />
        <Setter Property="Background" Value="White" />
        <Setter Property="CornerRadius" Value="10" />
    </Style>

    <Style TargetType="Border" x:Key="HeaderBorder">
        <Setter Property="Grid.Row" Value="0" />
        <Setter Property="Background" Value="#01000000" />
        <Setter Property="VerticalAlignment" Value="Stretch" />
        <Setter Property="HorizontalAlignment" Value="Stretch" />
        <Setter Property="CornerRadius" Value="10,10,0,0" />
    </Style>

</ResourceDictionary>

Example4.cs

namespace CommonWindow
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : WindowBase
    {
        public Window1()
        {
            InitializeComponent();
        }
    }
}

Example5.xml

<local:WindowBase x:Class="CommonWindow.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:CommonWindow"
    Title="Window1" Height="300" Width="300">

    <Label Content="blah" />
</local:WindowBase>