How to get the creation time of file in C#

<asp:FileUpload ID="FileUpload1" runat="server" />
 <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
   <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

 // this is a aspx.cs file
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;

public partial class we : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        
       DateTime creationTime = File.GetCreationTime(FileUpload1.FileName);
        
        Label1.Text =creationTime.ToString() ; 
    }
}