How to Delete XML File from Remote server at runtime

I have simple project in Asp.net  reading XML file on remote server.

I upload xml file using upload control , which will be saved on server database . for next file reading I want to delete previous uploaded file .

===================================

I have used this code :

protected void Button1_Click(object sender, EventArgs e)
    {

        if (FileUpload1.HasFile)
       {
            Label32.Visible = false;
            FileUpload1.SaveAs(Server.MapPath("~/") + FileUpload1.FileName);
        }
        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;

                }

======================================================

Please tell me how to delete it ? ?

-Many Thanks

:omshree