ryujinx/Ryujinx.Ava/Ui/Controls/InputDialog.axaml

<UserControl 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="Ryujinx.Ava.Ui.Controls.InputDialog">
    <Grid HorizontalAlignment="Stretch" VerticalAlignment="Center" Margin="5,10,5, 5">
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <TextBlock HorizontalAlignment="Center" Text="{Binding Message}" />
        <TextBox MaxLength="{Binding MaxLength}" Grid.Row="1" Margin="10" Width="300" HorizontalAlignment="Center"
                 Text="{Binding Input, Mode=TwoWay}" />
        <TextBlock Grid.Row="2" Margin="5, 5, 5, 10" HorizontalAlignment="Center" Text="{Binding SubMessage}" />
    </Grid>
</UserControl>