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="#F0F2F5">
		<!-- Верхняя панель с комбобоксами -->
		<Border DockPanel.Dock="Top"
                Background="#FFFFFF"
                CornerRadius="10"
                Padding="20"
                Margin="20"
               >
			<StackPanel HorizontalAlignment="Center" Spacing="20">
				<!-- Первый ComboBox для выбора группы -->
				<ComboBox ItemsSource="{Binding Groups}"
                          SelectedValue="{Binding SelectedGroupItem}"
                          Width="300"
                          Background="#F0F2F5"
                          CornerRadius="5"
                          FontSize="14">
					<ComboBox.ItemTemplate>
						<DataTemplate>
							<TextBlock Text="{Binding Name}" FontSize="14" />
						</DataTemplate>
					</ComboBox.ItemTemplate>
				</ComboBox>

				<!-- Второй ComboBox для выбора способа сортировки -->
				<ComboBox ItemsSource="{Binding SortOptions}"
                          SelectedItem="{Binding SelectedSortOption}"
                          Width="300"
                          Background="#F0F2F5"
                          CornerRadius="5"
                          FontSize="14">
					<ComboBox.ItemTemplate>
						<DataTemplate>
							<TextBlock Text="{Binding}" FontSize="14" />
						</DataTemplate>
					</ComboBox.ItemTemplate>
				</ComboBox>
			</StackPanel>
		</Border>

		<!-- Нижняя панель с кнопками -->
		<Border DockPanel.Dock="Bottom"
                Background="#FFFFFF"
                CornerRadius="10"
                Padding="20"
                Margin="20"
                >
			<StackPanel HorizontalAlignment="Center" Spacing="20">
				<Button Content="Удалить всех студентов"
                        Command="{Binding RemoveAllStudentsCommand}"
                        Width="250"
                        Background="#FF4D4D"
                        Foreground="#FFFFFF"
                        CornerRadius="5"
                        FontSize="14">
					<Button.Styles>
						<Style Selector="Button:pointerover">
							<Setter Property="Background" Value="#E53935"/>
						</Style>
					</Button.Styles>
				</Button>
				<Button Content="Добавить студента"
                        Command="{Binding AddStudentCommand}"
                        Width="250"
                        Background="#4CAF50"
                        Foreground="#FFFFFF"
                        CornerRadius="5"
                        FontSize="14">
					<Button.Styles>
						<Style Selector="Button:pointerover">
							<Setter Property="Background" Value="#43A047"/>
						</Style>
					</Button.Styles>
				</Button>
				<Button Content="Перейти на другую страницу"
                        Command="{Binding NextPageCommand}"
                        Width="250"
                        Background="#2196F3"
                        Foreground="#FFFFFF"
                        CornerRadius="5"
                        FontSize="14">
					<Button.Styles>
						<Style Selector="Button:pointerover">
							<Setter Property="Background" Value="#1E88E5"/>
						</Style>
					</Button.Styles>
				</Button>
			</StackPanel>
		</Border>

		<!-- Центральная панель для списка студентов -->
		<Border Background="#FFFFFF"
                CornerRadius="10"
                Padding="20"
                Margin="20"
                >
			<ListBox ItemsSource="{Binding Users}"
                     Width="500"
                     SelectionMode="Multiple"
                     SelectedItems="{Binding SelectedUsers}"
                     Background="Transparent">
				<ListBox.ItemTemplate>
					<DataTemplate>
						<Border Background="#F0F2F5"
                                CornerRadius="5"
                                Padding="10"
                                Margin="5">
							<TextBlock Text="{Binding Name}" FontSize="16" VerticalAlignment="Center" />
						</Border>
					</DataTemplate>
				</ListBox.ItemTemplate>

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