处理资源

我有以下XAML代码:

<Window xmlns:Controls="clr-namespace:Telerik.Windows.Controls;assembly=Telerik.Windows.Controls.Navigation"  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:resx="clr-namespace:DM.Properties"
    xmlns:ig="http://schemas.infragistics.com/xaml"
    xmlns:igWindows="http://infragistics.com/Windows"
    xmlns:igPrim="http://schemas.infragistics.com/xaml/primitives"
    xmlns:UI="clr-namespace:DM.Properties"
    xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
    x:Class="DM.PageEightInThree"
    WindowStartupLocation="CenterScreen"
    FontFamily="B Mitra"
    WindowStyle="None" ResizeMode="NoResize" 
    Title="Dummies Maker" Height="500" Width="1000" Background="#FF181818">
<Grid Margin="10">
    <telerik:RadCarousel x:Name="carsoul" VerticalAlignment="Top" Background="Black" Height="422" />
    <Button Width="173" FlowDirection="RightToLeft" VerticalAlignment="Bottom" HorizontalAlignment="Center" Click="Button_Click" TabIndex="0" Content="اضافه کردن آیکون جدید" Height="26" Margin="609,0,190,10" />
    <Button Width="173" FlowDirection="RightToLeft" VerticalAlignment="Bottom" HorizontalAlignment="Center" Click="Button_Click_1" TabIndex="1" Content="حذف آیکون" Height="26" Margin="410,0,389,10" />
    <Button Width="173" FlowDirection="RightToLeft" VerticalAlignment="Bottom" HorizontalAlignment="Center" Click="Button_Click_2" TabIndex="2" Content="بازگشت" Height="26" Margin="212,0,587,10" RenderTransformOrigin="-1.823,0.346" />
</Grid>

它背后的代码是:

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;
using System.Diagnostics;
using Telerik.Windows.Data;
using Telerik.Windows.Controls;
using Telerik.Windows.Controls.Navigation;
using DM.Properties;
namespace DM
{
    /// <summary>
    /// Interaction logic for PageEightInThree.xaml
    /// </summary>
    public partial class PageEightInThree : Window
    {
        internal static String pathOfIcons = @"Icons";
        internal static String txtFile = "Location.txt";
        public PageEightInThree()
        {
            InitializeComponent();
            this.Init();
            this.carsoul.ItemsSource = IconImagesForDummiesService.GetImages();
            this.carsoul.Focus();
        }
    private void Init()
    {
        List<String> res = new List<string>(50);
        String[] names = Directory.GetFiles(PageEightInThree.pathOfIcons, "*.*", SearchOption.AllDirectories);
        var items = names.Where(a => !a.Contains(txtFile));
        foreach (var inner in items)
        {
            res.Add(System.IO.Path.GetFileName(inner));
        }
        System.IO.File.WriteAllLines(pathOfIcons + @"/" + txtFile, res, Encoding.Unicode);
    }
}
public class IconImagesForDummies
{
    private String name;
    private Image image;
    public String Name
    {
        get
        {
            return this.name;
        }
        set
        {
            this.name = value;
        }
    }
    public Image Image
    {
        get
        {
            return this.image;
        }
        set
        {
            this.image = value;
        }
    }
}
public class IconImagesForDummiesService
{
    public static List<Image> GetImages()
    {
        String path = PageEightInThree.pathOfIcons + @"/" + PageEightInThree.txtFile;
        String path2 = PageEightInThree.pathOfIcons;
        List<Image> images = new List<Image>();
        ObservableCollection<IconImagesForDummies> icons = new ObservableCollection<IconImagesForDummies>();
        String[] lines = null;
        if (File.Exists(path))
            lines = File.ReadAllLines(path, Encoding.Unicode);
        if (lines != null)
        {
            for (int i = 0; i < lines.Length; ++i)
            {
                String str = path2 + "/" + lines[i];
                if (File.Exists(str))
                {
                    Image im = new Image();
                    im.Source = new BitmapImage(new Uri(str, UriKind.RelativeOrAbsolute));
                    im.Height = 200;
                    im.Width = 200;
                    images.Add(im);
                    icons.Add(new IconImagesForDummies() { Name = str, Image = im });
                }
            }
        }
        else
            throw new Exception("The Location.txt which stores the location of icons is missing");
        if (icons.Count == 0)
            throw new Exception("There is no icon image");
        List<Image> res = new List<Image>();
        for (int i = 0; i < icons.Count; ++i)
            res.Add(icons[i].Image);
        return res;
    }
}

我使用一个名为Location的文本文件，其中包含图标文件夹中所有图像的名称。我制作了一个图像列表，然后将其传递给WPF控件以显示图像。有一个名为Icon的文件夹，它包含Build Action设置为Copy Always的图像。起初程序工作正常，图标文件夹中的所有图像都显示正常，但是重新运行程序两三次后，图像不显示，这是为什么?