v2rayN/v2rayN/v2rayN.Desktop/Views/QrcodeView.axaml

<UserControl
    x:Class="v2rayN.Desktop.Views.QrcodeView"
    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"
    xmlns:sys="clr-namespace:System;assembly=netstandard"
    d:DesignHeight="600"
    d:DesignWidth="600"
    mc:Ignorable="d">

    <UserControl.Resources>
        <sys:Double x:Key="QrcodeWidth">500</sys:Double>
    </UserControl.Resources>

    <Grid Margin="32" RowDefinitions="Auto,Auto">
        <Image
            Name="imgQrcode"
            Width="{StaticResource QrcodeWidth}"
            Height="{StaticResource QrcodeWidth}" />

        <TextBox
            x:Name="txtContent"
            Grid.Row="1"
            Width="{StaticResource QrcodeWidth}"
            MaxHeight="100"
            Margin="{StaticResource MarginTb8}"
            VerticalAlignment="Center"
            IsReadOnly="True"
            TextWrapping="WrapWithOverflow" />

    </Grid>
</UserControl>