problem with file deleting in c#

try
       {
           //System.IO.File.Delete(@"E:\sasi\ss");
           string path = @"e:\sasi\delt.doc";
           FileInfo myfileinf = new FileInfo(path);
           myfileinf.Delete();

           Response.Write("<script>alert('deleted')</script>");
       }
       catch (Exception  ex)
       {

           Label l = new Label();
           l.Text = ex.Message;
           Form.Controls.Add(l);
       }