Agents/Functions/AddProduct.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="800" d:DesignHeight="600"
        x:Class="Agents.AddProduct"
        Title="Добавление и удаление продукта"
		xmlns:vm="using:Agents.Models">
	<DockPanel Background="Blue">
		<ScrollViewer>
			<StackPanel>
				<StackPanel HorizontalAlignment="Center">
					<Border
					Background="Red"
					CornerRadius="10"
					Padding="20"
					Margin="20"
					Width="750"
					Height="300"
						>
						<ScrollViewer>
							<StackPanel>
								<TextBlock Text="Список продуктов" HorizontalAlignment="Center" Foreground="Blue"/>
								<ListBox Name="ListProducts">
									<ListBox.ItemTemplate>
										<DataTemplate x:DataType="vm:Product">
											<StackPanel>

												<StackPanel Orientation="Horizontal">
													<TextBlock Text="Название продукта: "/>
													<TextBlock Text="{Binding Title}"/>
												</StackPanel>

												<StackPanel Orientation="Horizontal">
													<TextBlock Text="Описание товара: "/>
													<TextBlock Text="{Binding Description}"/>
												</StackPanel>

												<StackPanel Orientation="Horizontal">
													<TextBlock Text="Название продукта: "/>
													<TextBlock Text="{Binding Productionpersoncount}"/>
												</StackPanel>

												<StackPanel Orientation="Horizontal">
													<TextBlock Text="Артикул: "/>
													<TextBlock Text="{Binding Articlenumber}"/>
												</StackPanel>

												<StackPanel Orientation="Horizontal">
													<TextBlock Text="Минимальная цена для агента: "/>
													<TextBlock Text="{Binding Mincostforagent}"/>
													<TextBlock Text=" Руб."/>
												</StackPanel>


											</StackPanel>
										</DataTemplate>
									</ListBox.ItemTemplate>
								</ListBox>
							</StackPanel>
						</ScrollViewer>
					</Border>

				</StackPanel>

				<StackPanel Spacing="15" HorizontalAlignment="Center" Orientation="Horizontal">

					<StackPanel>
						<TextBlock Text="Введите Название"/>
						<TextBox Width="200" x:Name="TextNewTitle" Text=""/>
					</StackPanel>

					<StackPanel>
						<TextBlock Text="Введите новый Артикул"/>
						<TextBox Width="200" x:Name="TextNewArticlenumber" Text=""/>
					</StackPanel>

					<StackPanel>
						<TextBlock Text="Введите минимальную цену (в рублях)"/>
						<NumericUpDown Value="" Width="150" Minimum="0" Name="TextNewMincostforagent"/>
					</StackPanel>

					
				</StackPanel>

				<StackPanel Spacing="15" HorizontalAlignment="Center" Orientation="Horizontal">

					<StackPanel HorizontalAlignment="Center">
						
						
						<StackPanel>

							<TextBlock Text="Выберите тип продукта" HorizontalAlignment="Center"/>
							<ComboBox Name="ListProductType" HorizontalAlignment="Center" Width="200">
								<ComboBox.ItemTemplate>
									<DataTemplate x:DataType="vm:Producttype">
										<TextBlock Text="{Binding Title}"/>
									</DataTemplate>
								</ComboBox.ItemTemplate>
							</ComboBox>
						</StackPanel>
						
					</StackPanel>

					

					<StackPanel HorizontalAlignment="Center">
						<TextBlock Text="Введите количество"/>
						<NumericUpDown Value="" Width="150" Minimum="0" Name="TextNewCount"/>
					</StackPanel>

				</StackPanel>
				
				<Button Content="Добавить" Click="Addproduct" Background="Green" HorizontalAlignment="Center"/>
				<Button Content="Удалить" Click="DeleteProduct" Background="Red" Foreground="White" HorizontalAlignment="Center"/>
				<Button Content="Назад" Click="Exit" Background="Green" HorizontalAlignment="Center"/>
				<TextBlock Name="Status" Text="" HorizontalAlignment="Center"/>
			</StackPanel>
		</ScrollViewer>
	</DockPanel>
</Window>