presence/Presence.Desktop/Views/GroupView.axaml

<UserControl xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:Presence.Desktop.ViewModels"
        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="Presence.Desktop.Views.GroupView"
        x:DataType="vm:GroupViewModel">



	<DockPanel Background="#F9F9F9">
		<!-- Верхняя панель с комбобоксами -->
		<StackPanel DockPanel.Dock="Top"
                    HorizontalAlignment="Center"
                    Margin="20"
                    Spacing="15">
			<!-- Первый ComboBox для выбора группы -->
			<ComboBox ItemsSource="{Binding Groups}"
                      SelectedValue="{Binding SelectedGroupItem}"
                      HorizontalAlignment="Center"
                      Width="300">
				<ComboBox.ItemTemplate>
					<DataTemplate>
						<TextBlock Text="{Binding Name}" />
					</DataTemplate>
				</ComboBox.ItemTemplate>
			</ComboBox>

			<!-- Второй ComboBox для выбора способа сортировки -->
			<ComboBox ItemsSource="{Binding SortOptions}"
                      SelectedItem="{Binding SelectedSortOption}"
                      HorizontalAlignment="Center"
                      Width="300">
				<ComboBox.ItemTemplate>
					<DataTemplate>
						<TextBlock Text="{Binding}" />
					</DataTemplate>
				</ComboBox.ItemTemplate>
			</ComboBox>
		</StackPanel>

		<!-- Нижняя панель с кнопками -->
		<StackPanel DockPanel.Dock="Bottom"
                    HorizontalAlignment="Center"
                    VerticalAlignment="Center"
                    Margin="20"
                    Spacing="15">
			<Button Content="Удалить всех студентов"
                    Command="{Binding RemoveAllStudentsCommand}"
                    HorizontalAlignment="Center"
                    Width="250"/>
			<Button Content="Добавить студента"
                    Command="{Binding AddStudentCommand}"
                    HorizontalAlignment="Center"
                    Width="250"/>
			<Button Content="Перейти на другую странцу"
					Command="{Binding NextPageCommand}"
					 HorizontalAlignment="Center"
                    Width="250"/>
		</StackPanel>

		<!-- Центральная панель для списка студентов -->
		<ListBox ItemsSource="{Binding Users}"
                 HorizontalAlignment="Center"
                 Width="400"
                 Margin="20"
                 SelectionMode="Multiple"
                 SelectedItems="{Binding SelectedUsers}">
			<ListBox.ItemTemplate>
				<DataTemplate>
					<StackPanel Orientation="Horizontal" Margin="5">
						<TextBlock Text="{Binding Name}" VerticalAlignment="Center" />
					</StackPanel>
				</DataTemplate>
			</ListBox.ItemTemplate>

			<ListBox.ContextMenu>
				<ContextMenu>
					<MenuItem Header="Удалить" Click="OnDeleteUserClick"/>
					<MenuItem Header="Редактировать" Click="OnEditUserClick"/>
				</ContextMenu>
			</ListBox.ContextMenu>
		</ListBox>
	</DockPanel>
</UserControl>