Sheas-Cealer/App.xaml

<Application x:Class="Sheas_Cealer.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             Startup="App_OnStartup" DispatcherUnhandledException="App_DispatcherUnhandledException">
    <Application.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <materialDesign:BundledTheme BaseTheme="Inherit" PrimaryColor="Red" SecondaryColor="Orange" />
                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesign3.Defaults.xaml" />
            </ResourceDictionary.MergedDictionaries>

            <Style x:Key="CommonWindow" TargetType="{x:Type Window}">
                <Setter Property="AutomationProperties.Name" Value="Sheas Cealer" />
                <Setter Property="Background" Value="{DynamicResource MaterialDesignPaper}" />
                <Setter Property="Foreground" Value="{DynamicResource MaterialDesignBody}" />
            </Style>

            <Style BasedOn="{StaticResource MaterialDesignFilledTextBox}" TargetType="{x:Type TextBox}" />

            <Style BasedOn="{StaticResource MaterialDesignRaisedButton}" TargetType="{x:Type Button}">
                <Setter Property="Height" Value="Auto" />
                <Setter Property="Width" Value="Auto" />
                <Setter Property="Foreground" Value="{DynamicResource MaterialDesignBackground}" />
            </Style>
        </ResourceDictionary>
    </Application.Resources>
</Application>