newDemoAvaloniaVal/AvaloniaValidation/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" d:DesignWidth="400" d:DesignHeight="450"
        Width="1150"
        Height="700"
        x:Class="AvaloniaValidation.MainWindow"
        x:CompileBindings="False"
        Title="AvaloniaValidation">
<DockPanel>
        
        <StackPanel Orientation="Horizontal" DockPanel.Dock="Top" HorizontalAlignment="Center" Margin="5">
            <TextBlock FontSize="20" FontWeight="Bold" Text = "Мероприятия"/>
        </StackPanel>
        <StackPanel Orientation="Horizontal" DockPanel.Dock="Top" HorizontalAlignment="Right" Margin="5">
            <ComboBox Width="150" x:Name="Направление" Margin="5">
                <ComboBoxItem Content="IT"/>
                <ComboBoxItem Content="Менеджмент"/>
                <ComboBoxItem Content="Другое"/>
            </ComboBox>
            <ComboBox Width="150" x:Name="Дата" Margin="5">
                <ComboBoxItem Content="Возрастание"/>
                <ComboBoxItem Content="Убывание"/>
                <ComboBoxItem Content="Все диапазоны"/>
            </ComboBox>
            <Button Content="Регистрация" Click="Registration"/>
        </StackPanel>
        
        <StackPanel Orientation="Horizontal" DockPanel.Dock="Bottom" HorizontalAlignment="Center">
            <ListBox x:Name="EventListBox">
                 <ListBox.ItemsPanel>
                     <ItemsPanelTemplate>
                     <UniformGrid Columns="1"></UniformGrid>
                     </ItemsPanelTemplate>
                 </ListBox.ItemsPanel>
                <ListBox.ItemTemplate>
                    <DataTemplate>
                        <Border BorderBrush="Gray" BorderThickness="1" Padding="10">
                            <StackPanel Orientation="Horizontal" Spacing="10">
                                <Image Width="150" Height="100" Source="{Binding Image}" VerticalAlignment="Center" Stretch="Uniform"/>
                                <StackPanel>
                                    <TextBlock>
                                    <Run Text="Событие: "/>
                                    <Run Text="{Binding Sobitie}"/>
                                    </TextBlock>
                                    <TextBlock>
                                        <Run Text="Дата: "/>
                                        <Run Text="{Binding Date}"/>
                                    </TextBlock>
                                    <TextBlock>
                                        <Run Text="Город: "/>
                                        <Run Text="{Binding City}"/>
                                    </TextBlock>
                                    <TextBlock>
                                        <Run Text="Дни: "/>
                                        <Run Text="{Binding Days}"/>
                                    </TextBlock>
                                </StackPanel>
                            </StackPanel>
                        </Border>
                    </DataTemplate>
                </ListBox.ItemTemplate>
            </ListBox>
        </StackPanel>
    </DockPanel>
</Window>