XML File not replaced with previous file on Online website.

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ASP.NET

Hi Team,

I have one project which shows XML File data in ASP.NET.

I have published this website online on "http://mytelstraapp.in ". I have multiple customers they submit there data in XML File having fixed name "Form Data.xml"

For First Customer: I have XML File having name "Form Data.xml" For First time when i upload that file online it shows all data correctly.

When For second example, If i upload file as "Form Data.xml" it shows error
Access to the path 'D:\WEBDATA\mytelstraapp.in\Form Data.xml' is denied.

as Form data.xml is already present on server. So Every time I have to Rename that File to get data of second customer .

Please Tell me way so That It Gets Replaced with previous file and will show latest Form Data.xml File data.

I have used this Code

protected void Button1_Click(object sender, EventArgs e)
   {
       if (FileUpload1.HasFile)
       {



           FileUpload1.SaveAs(Server.MapPath("~/") + FileUpload1.FileName);

           Label32.Visible = false;

       }

      if(FileUpload1.HasFile)
      {
       Panel1.Visible = true;
       Panel2.Visible = true;

       FileUpload1.Visible = false;
       Button1.Visible = false;
       XmlReader xmlRdr = XmlReader.Create(Server.MapPath("~/") + FileUpload1.FileName);

       while (xmlRdr.Read())
       {
           if (xmlRdr.Name == "CompanyName")
           {
               Label13.Text = (Label13.Text == string.Empty) ? xmlRdr.ReadString() : Label13.Text;
           }