<Window xmlns="https://github.com/avaloniaui" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" d:DesignWidth="550" d:DesignHeight="90" x:Class="MPN00BS.MpOrSp" Title="Select Mode" Height="90" Width="550" MaxWidth="550" MaxHeight="90" Icon="/icon.ico"> <Grid Height="70" Width="550" HorizontalAlignment="Center" VerticalAlignment="Center" > <Grid.RowDefinitions> <RowDefinition Height="1*" /> <RowDefinition Height="1*" /> </Grid.RowDefinitions> <Button Name="playSingleplayer" Content="Play Singleplayer" HorizontalAlignment="Center" VerticalAlignment="Center" Width="515" Click="playSingleplayerClick" Grid.Row="0"/> <Button Name="playMultiplayer" Content="Play Multiplayer" HorizontalAlignment="Center" VerticalAlignment="Center" Width="515" Click="playMultiplayerClick" Grid.Row="1"/> </Grid> </Window>