MainWindow.axaml

<Window xmlns="https://github.com/avaloniaui"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="LuckyDrawApp.MainWindow"
    Title="Lucky Draw App">
    <Grid RowDefinitions="Auto,*,50,Auto,*" ColumnDefinitions="*,*" Margin="20" Height="600" Width="800">
        <TextBlock Grid.Row="0" Grid.Column="0" Text="Participants:" FontWeight="SemiBold" 
            HorizontalAlignment="Center" Margin="0,0,0,10" />
        <TextBox x:Name="textBoxParticipants" Grid.Row="1" Grid.Column="0" AcceptsReturn="True" TextWrapping="Wrap"
            ScrollViewer.VerticalScrollBarVisibility="Auto" Margin="0,0,10,0" />

        <StackPanel Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2" Orientation="Horizontal" 
            HorizontalAlignment="Center" Spacing="10">
            <Button x:Name="ButtonLoadExcel" Margin="5" Click="ButtonLoadExcel_Click">Load Excel</Button>
            <Button x:Name="buttonDraw" Margin="5" Content="Draw Winners" Click="ButtonDraw_Click" />
        </StackPanel>

        <TextBlock Grid.Row="0" Grid.Column="1" Text="Winners:" FontWeight="SemiBold" 
            HorizontalAlignment="Center" Margin="0,0,0,10" />
        <TextBox x:Name="textBoxWinners" Grid.Row="1" Grid.Column="1" IsReadOnly="True" TextWrapping="Wrap"
            ScrollViewer.VerticalScrollBarVisibility="Auto" Margin="10,0,0,0" />
    </Grid>
</Window>