AvaloniaKnuScool/Views/CoursesList.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" d:DesignWidth="800" d:DesignHeight="450"
             x:Class="AvaloniaApplication1.CoursesList"
             x:DataType="vm:MainWindowViewModel"
             xmlns:vm="using:AvaloniaApplication1.ViewModels"
             >

  <Grid RowDefinitions="*,6*">
    <StackPanel Orientation="Horizontal">
        <ComboBox Margin="10,0,0,0" Width="150" SelectedItem="{Binding CourseVM.SelectedNameOrHour}" ItemsSource="{Binding CourseVM.OrderNameOrHours}"/>
        <ComboBox Margin="10,0,0,0" Width="150" SelectedItem="{Binding CourseVM.SelectedFilter}" ItemsSource="{Binding CourseVM.FilterByHours}"/>
        <TextBox Margin="100,0,0,0" Width="300" Text="{Binding CourseVM.NameOrHoursFind}" Watermark="Поиск по имени или количеству часов"></TextBox>
    </StackPanel>
    
  <ListBox ItemsSource="{Binding CourseVM.Courses}" Grid.Row="1">
      <ListBox.ItemTemplate>
        <DataTemplate>
          <Border CornerRadius="4" BorderBrush="DarkGreen" BorderThickness="1" Padding="15">
            <StackPanel>
              <TextBlock Text="{Binding Course1}"></TextBlock>
              <TextBlock Text="{Binding HoursCount}"></TextBlock>
              <TextBlock Text="{Binding CountTeachers}"></TextBlock>
            </StackPanel>
          </Border>
        </DataTemplate>
      </ListBox.ItemTemplate>
    </ListBox>
  </Grid>
  
</UserControl>