Creating a Custom Window in WPF

Example1.xml

<Window x:Class="CustomWindow.Window1"
    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"
    Title="Window1" Height="300" Width="300">
    <Grid>

    </Grid>
</Window>

Example2.xml

<Window x:Class="CustomWindow.Window1"
    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"
    Title="Window1" Height="300" Width="300"
    AllowsTransparency="True" WindowStyle="None" Background="Transparent">
    <Grid>

    </Grid>
</Window>

Example3.xml

<Window x:Class="CustomWindow.Window1"
    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"
    Title="Window1" Height="300" Width="300"
    AllowsTransparency="True" WindowStyle="None" Background="Transparent">

    <Border BorderThickness="1" BorderBrush="Black" Background="White"
        Margin="0" CornerRadius="10">
    </Border>

</Window>

Example4.xml

<Window x:Class="CustomWindow.Window1"
    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"
    Title="Window1" Height="300" Width="300"
    AllowsTransparency="True" WindowStyle="None" Background="Transparent">

    <Border BorderThickness="1" BorderBrush="Black" Background="White"
        Margin="0" CornerRadius="10">
        <Border Height="40" Background="#01000000" VerticalAlignment="Top"
            CornerRadius="10,10,0,0" MouseLeftButtonDown="DragWindow"/>
    </Border>

</Window>

Example5.cs

using System.Windows;
using System.Windows.Input;

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

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

Example6.xml

<Window x:Class="CustomWindow.Window1"
    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"
    Title="Window1" Height="300" Width="300"
    AllowsTransparency="True" WindowStyle="None" Background="Transparent">

    <aero:SystemDropShadowChrome CornerRadius="10" Margin="10">
        <Border BorderThickness="1" BorderBrush="Black" Background="White"
            Margin="0" CornerRadius="10">
            <Border Height="40" Background="#01000000" VerticalAlignment="Top"
                CornerRadius="10,10,0,0" MouseLeftButtonDown="DragWindow"/>
        </Border>
    </aero:SystemDropShadowChrome>

</Window>