MainWindow.xaml

<Window x:Class="SodaCL.MainWindow" 
        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" 
        xmlns:MyNamespace="clr-namespace:SodaCL.Controls" 
        xmlns:local="clr-namespace:SodaCL" 
        mc:Ignorable="d" Title="SodaCL" Height="500" Width="800" WindowStyle="None" AllowsTransparency="True" Background="Transparent" OpacityMask="White" Initialized="Window_Initialized">
    <Grid Margin="10">
        <Grid.Effect>
            <DropShadowEffect BlurRadius="15" Direction="-90" RenderingBias="Quality" ShadowDepth="2"/>
        </Grid.Effect>
        <Border CornerRadius="20,20,20,20" Background="White"></Border>
        <Border Height="45" Background="White" CornerRadius="20,20,0,0" VerticalAlignment="Top" MouseLeftButtonDown="Border_MouseLeftButtonDown" Grid.ColumnSpan="2">
            <StackPanel Height="45" VerticalAlignment="Top" Orientation="Horizontal">
                <Image Height="32" Width="32" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="11,5,0,0" Source="/Resources/Images/Dev-Version.ico" />
                <Label Content="Soda Craft Launcher" Height="30" Margin="5,3,0,0" FontSize="18" />
                <Label Name ="ButtonClose" Content="  ×"   FontSize="16" MouseDown="Label_MouseDown" Width="39" Height="30" Margin="500,0,0,0" MouseEnter="Label1_MouseEnter" MouseLeave="Label1_MouseLeave" ToolTip="关闭" Foreground="White">
                    <Label.Background>
                        <ImageBrush/>
                    </Label.Background>
                </Label>
            </StackPanel>
        </Border>
    </Grid>
</Window>