App.xaml

<Application x:Class="JustEng.App"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:local="clr-namespace:JustEng"
			 xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"
			 xmlns:vm="clr-namespace:JustEng.ViewModels"
			 StartupUri="Views\Windows\MainWindow.xaml">
    <Application.Resources>
		<ResourceDictionary>
			<ResourceDictionary.MergedDictionaries>
				<materialDesign:BundledTheme BaseTheme="Dark" PrimaryColor="Purple"  SecondaryColor="Lime" />
				<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml" />
			</ResourceDictionary.MergedDictionaries>
			<Style TargetType="Button" x:Key="RoundButton" BasedOn="{StaticResource MaterialDesignPaperButton}">
				<Style.Resources>
					<Style TargetType="Border">
						<Setter Property="CornerRadius" Value="15" />
					</Style>
				</Style.Resources>
			</Style>
			<vm:ViewModelLocator x:Key="Locator"/>
		</ResourceDictionary>
	</Application.Resources>
</Application>