Basic WPF Xaml

Basic-XAML

<Window x:Class="WpfApp.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <StackPanel>
        <Expander Header="Expander 1">
            <UniformGrid Rows="2" Columns="2">
                <Button Content="Button 1"/>
                <Button Content="Button 2"/>
                <Button Content="Button 3"/>
                <Button Content="Button 4"/>
            </UniformGrid>
        </Expander>
        <Expander Header="Expander 2">
            <UniformGrid Rows="2" Columns="2">
                <Button Content="Button 5"/>
                <Button Content="Button 6"/>
                <Button Content="Button 7"/>
                <Button Content="Button 8"/>
            </UniformGrid>
        </Expander>
    </StackPanel>
</Window>