code editor testing

Below is the content of the files mentioned above (please remove those numbers inside the code - they, by some reason, were put there by the code editor used to prepare this post).

MainWindow.xaml.cs:

using Microsoft.Dynamics.Commerce.RetailProxy;
using System;
using System.Configuration;
using System.Windows;
 
public partial class MainWindow : Window
{
    readonly ManagerFactory managerFactory;
    public MainWindow()
    {
        // Creating an instance of RetailServerContext by supplying Retail Service URL And Operating Unit Number.
        RetailServerContext context = RetailServerContext.Create(
           new Uri(ConfigurationManager.AppSettings["RetailServerRoot"]),
           ConfigurationManager.AppSettings["OperatingUnitNumber"]);
 
        // Creating a factory based on RetailServerContext.
 
        managerFactory = ManagerFactory.Create(context);
 
        InitializeComponent();
    }
 
    protected override async void OnInitialized(EventArgs e)
    {
        base.OnInitialized(e);
 
        // Getting a channelID.
        IOrgUnitManager orgUnitManager = managerFactory.GetManager<IOrgUnitManager>();
        ChannelConfiguration channelConfiguration = await orgUnitManager.GetOrgUnitConfiguration();
 
        // Loading categories.
        ICategoryManager categoryManager = managerFactory.GetManager<ICategoryManager>();
        PagedResult<Category> categories = await categoryManager.GetCategories(channelConfiguration.RecordId, new QueryResultSettings { Paging = new PagingInfo { Skip = 0, Top = 100 } });
 
        // Binding categories to UI element to be displayed there.
        listView.ItemsSource = categories;
    }
}