how to Open a PDF file in asp.net

DataSet ds = new DataSet();
                ds = GetFile();

                if (ds.Tables[0].Rows.Count == 1)
                {
                    string strContentType = ds.Tables[0].Rows[0]["FileType"].ToString();
                    Response.Charset = "";
                    Response.ContentType = strContentType;
                    Response.AppendHeader("Content-Type", strContentType);
                    int nlen = Int32.Parse(ds.Tables[0].Rows[0]["FileSize"].ToString());

                    if (nlen > 0)
                    {
                        byte[] myData = new byte[nlen];
                        myData = (byte[])ds.Tables[0].Rows[0]["CompanyBrochure"];
                        MemoryStream mstream = new MemoryStream(myData, 0, myData.Length);
                        Response.Clear();
                        Response.Buffer = true;
                        //string fileName = Path.GetFileName(ds.Tables[0].Rows[0]["FileType"].ToString());
                        string fileName = "";
                        Response.AddHeader("Content-Disposition", "inline;filename=" + fileName);
                        Response.BinaryWrite(mstream.ToArray());
                        Response.Flush();
                        Response.End();
                    }
                }