Agents/Functions/ProductEditor.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="450"
        x:Class="Agents.ProductEditor"
        Title="Редактировать продукт"
		Icon="avares://Agents/Assets/Icon.ico"
		xmlns:vm="using:Agents.Models">
	<DockPanel Background="Blue">
	<StackPanel Spacing="15">
		
		<StackPanel>
			<TextBlock Text="Выберите Продукт" HorizontalAlignment="Center"/>
			<ComboBox HorizontalAlignment="Center" Name="ListProducts" Width="400" SelectionChanged="ListProducts_SelectionChanged">
				<ComboBox.ItemTemplate>
					<DataTemplate x:DataType="vm:Product">
						<TextBlock Text="{Binding Title}"/>
					</DataTemplate>
				</ComboBox.ItemTemplate>
			</ComboBox>
		</StackPanel>

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

			<StackPanel Orientation="Vertical">
				<TextBlock Text="Введите количество продукта"/>
				<NumericUpDown Value="" Width="150" Minimum="0" Name="TextNewProductionpersoncount"/>
			</StackPanel>

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

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

		</StackPanel>

		<StackPanel>
			<Button Content="Изменить данные" Click="ButtonChange" HorizontalAlignment="Center" Background="Green"/>
			<Button Content="Назад" Click="Exit" HorizontalAlignment="Center" Background="Green"/>
		</StackPanel>

		<TextBlock Name="Status" Text="" HorizontalAlignment="Center"/>

	</StackPanel>	
	</DockPanel>
</Window>