<Application
  x:Class="YourMainNamespace.App"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:local="clr-namespace:YourMainNamespace"
  StartupUri="MainWindow.xaml">
  <Application.Resources>
    <ResourceDictionary>
      <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="pack://application:,,,/MaterialWPF;component/Styles/ThemeDark.xaml" />
        <ResourceDictionary Source="pack://application:,,,/MaterialWPF;component/Styles/Material.xaml" />
      </ResourceDictionary.MergedDictionaries>
    </ResourceDictionary>
  </Application.Resources>
</Application>

<Window
  x:Class="YourMainNamespace.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:materialwpf="clr-namespace:MaterialWPF.Controls;assembly=MaterialWPF"
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  Width="1160"
  Height="612"
  Style="{StaticResource MaterialNavigationWindow}"
  WindowStartupLocation="CenterScreen"
  mc:Ignorable="d">
  <Grid>
    <!--  An example of splitting the window grid to make everything look nice  -->
    <Grid.ColumnDefinitions>
      <ColumnDefinition Width="Auto" />
      <ColumnDefinition Width="*" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
      <RowDefinition Height="Auto" />
      <RowDefinition Height="*" />
    </Grid.RowDefinitions>

    <!--  Navigation Control, displays buttons for navigating pages  -->
    <materialwpf:Navigation
      x:Name="rootNavigation"
      Grid.Row="0"
      Grid.RowSpan="2"
      Grid.Column="0" />

    <!--  Main content frame, instances of the Page class are loaded into it  -->
    <Grid Grid.Row="1" Grid.Column="1">
      <Frame x:Name="rootFrame" />
    </Grid>

    <!--  Buttons for navigating the application window (minimize, maximize, close)  -->
    <materialwpf:WindowNavigation Grid.Row="0" Grid.Column="1" />

    <!--  Splash to make the app look nice on startup. You can use it while loading resources  -->
    <materialwpf:Splash
      x:Name="mainSplash"
      Grid.RowSpan="2"
      Grid.ColumnSpan="2" />
  </Grid>
</Window>