how to upload and display the multiple images on webpage dynamically using asp.net and c#.

<form id="form1"  runat="server">
    <div>
    <asp:FileUpload AllowMultiple="true" ID="fileuploadimages" runat="server" />
    <asp:Button runat="server" ID="btnUpload" CssClass="btnStyle" Text="Upload Image"
        OnClick="btnUpload_Click" />
    <asp:Label ID="listofuploadedfiles" runat="server" />
    <div id="dvGallery"  runat="server">

    </div>
    </div>
    </form>

public partial class galle4 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            PopulateImage();
        }
    }
    protected void btnUpload_Click(object sender, EventArgs e)
    {
        if (fileuploadimages.HasFiles)
        {
            foreach (HttpPostedFile uploadedFile in fileuploadimages.PostedFiles)
            {
                uploadedFile.SaveAs(System.IO.Path.Combine(Server.MapPath("~/images/"),
                uploadedFile.FileName));
                listofuploadedfiles.Text = string.Format("updated successfully");
            }
            PopulateImage();
        }
    }
    private void PopulateImage()
    {
        DirectoryInfo dir = new DirectoryInfo(Server.MapPath("~/Images"));
        foreach (var i in dir.GetFiles())
        {
            dvGallery.InnerHtml = "<img src='~/Images + file.Name'/>";
        }
    }
}