App.xaml

<Application x:Class="ManaTranslation.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             StartupUri="MainWindow.xaml">
    <Application.Resources>
        <Style x:Key="for_noresize_window" TargetType="{x:Type Window}">
            <Setter Property="AllowsTransparency" Value="true"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="ResizeMode" Value="NoResize"/>
            <Setter Property="WindowStyle" Value="None"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Window}">
                        <Grid Margin="10">
                            <Rectangle Fill="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"  
                               RadiusX="5" RadiusY="5">
                                <Rectangle.Effect>
                                    <DropShadowEffect BlurRadius="10" ShadowDepth="0"/>
                                </Rectangle.Effect>
                            </Rectangle>
                            <Border Background="{TemplateBinding Background}"  
                            BorderBrush="{TemplateBinding BorderBrush}"  
                            BorderThickness="{TemplateBinding BorderThickness}"  
                            Padding="{TemplateBinding Margin}"  
                            SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"  
                            CornerRadius="5">
                                <ContentPresenter />
                            </Border>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
    </Application.Resources>
</Application>