从图片数组中检索图像属性

我目前正在用c#开发一个Windows窗体应用程序。我想知道我如何能检索的日期和时间的图像被创建。我在网上检查了解决方案，并找到了对PropertyItem的引用，但我没有理解如何使用它

下面的代码从文件夹中获取照片并将它们显示在一个图片数组中。
我如何显示日期和时间的图片是创建在一个消息框，当它被点击?

    // Function to add PictureBox Controls
    private void AddControls(int cNumber)
    {
        imgArray = new System.Windows.Forms.PictureBox[cNumber]; // assign number array 
        for (int i = 0; i < cNumber; i++)
        {
            imgArray[i] = new System.Windows.Forms.PictureBox(); // Initialize one variable
        }
        // When call this function you determine number of controls
    }
    private void ClickImage(Object sender, System.EventArgs e)
    {
        // On Click: load (ImageToShow) with (Tag) of the image
        ImageToShow = ((System.Windows.Forms.PictureBox)sender).Tag.ToString();
        // then view this image on the form (frmView)
        PrivacyDefenderTabControl.SelectedIndex = 5;
        LogsPhotosPictureBox.Image = Image.FromFile(ImageToShow);
        LogsPhotosPictureBox.Left = (this.Width - LogsPhotosPictureBox.Width) / 15;
    }
    private void ImagesInFolder()
    {
        FileInfo FInfo;
        // Fill the array (imgName) with all images in any folder 
        imgName = Directory.GetFiles(Application.StartupPath + @"'Faces");
        // How many Picture files in this folder
        NumOfFiles = imgName.Length;
        imgExtension = new string[NumOfFiles];
        for (int i = 0; i < NumOfFiles; i++)
        {
            FInfo = new FileInfo(imgName[i]);
            imgExtension[i] = FInfo.Extension; // We need to know the Extension
        }
    }
    private void ShowFolderImages()
    {
        int Xpos = 27;
        int Ypos = 8;
        Image img;
        Image.GetThumbnailImageAbort myCallback =
            new Image.GetThumbnailImageAbort(ThumbnailCallback);
        MyProgress.Visible = true;
        MyProgress.Minimum = 0;
        MyProgress.Maximum = NumOfFiles;
        MyProgress.Value = 0;
        MyProgress.Step = 1;
        string[] Ext = new string[] { ".GIF", ".JPG", ".BMP", ".PNG" };
        AddControls(NumOfFiles);
        for (int i = 0; i < NumOfFiles; i++)
        {
            switch (imgExtension[i].ToUpper())
            {
                case ".JPG":
                case ".BMP":
                case ".GIF":
                case ".PNG":
                    img = Image.FromFile(imgName[i]); // or img = new Bitmap(imgName[i]);
                    imgArray[i].Image = img.GetThumbnailImage(64, 64, myCallback, IntPtr.Zero);
                    img = null;
                    if (Xpos > 360) // six images in a line
                    {
                        Xpos = 27; // leave eight pixels at Left 
                        Ypos = Ypos + 72;  // height of image + 8
                    }
                    imgArray[i].Left = Xpos;
                    imgArray[i].Top = Ypos;
                    imgArray[i].Width = 64;
                    imgArray[i].Height = 64;
                    imgArray[i].Visible = true;
                    // Fill the (Tag) with name and full path of image
                    imgArray[i].Tag = imgName[i];
                    imgArray[i].Click += new System.EventHandler(ClickImage);
                    this.LogsTabPage.Controls.Add(imgArray[i]);
                    Xpos = Xpos + 72; // width of image + 8
                    Application.DoEvents();
                    MyProgress.PerformStep();
                    break;
            }
        }
        MyProgress.Visible = false;
    }