MainWindow.axaml

<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"
        x:Class="multiverseFinder.MainWindow"
        Title="Multiverse Finder"
        Width="420"
        Height="245"
        Background="AliceBlue">
        <StackPanel>
            <Border Background="Gainsboro"
                    BorderBrush="Black"
                    Padding="10" Margin="0"
                    HorizontalAlignment="Center"
                    Width="420"
                    >
                <TextBlock HorizontalAlignment="Center" Foreground="Black">Rick and Morty Multiverse Finder</TextBlock>
            </Border>
            
            <TextBox x:Name="characterName" Watermark="Character Name" Margin="5"/>
            <Button Content="Get Character" Cursor="Hand" Margin="5"  Background="Gray" HorizontalAlignment="Center" Click="Button_Click"/>
            <TextBlock x:Name="greetingOutput" />
            <TextBox  x:Name="resultBox" Height="100" IsReadOnly="True"  TextWrapping="Wrap" Margin="5"/>
        </StackPanel>
</Window>