corrupt .docx issues

openFileDialog1.Title = "Upload Files";
             openFileDialog1.Filter = "PDF File (*.pdf)|*.pdf|All Files (*.*)|*.*";
             // openFileDialog1.Filter = "PDF File (*.pdf)|*.pdf|DOC File (*.doc*)|*.doc*|TXT File (*.txt)|*.txt|Excel Files (*.xls*)|*.xls*";
             openFileDialog1.FilterIndex = 1; // set on Word Files (*.doc)
             openFileDialog1.FileName = " ";
             openFileDialog1.ShowDialog();
             openFileDialog1.CheckFileExists = true;
             TBPath.Text = openFileDialog1.FileName;

             string pathold = TBPath.Text;
             string filename = Path.GetFileName(pathold);
             string strDocExt = Path.GetExtension(pathold);



             string query = "SELECT * From P2_Files where Control_No = '" + ControlNo.Trim() + "' and  DocTitle = '" + filename + "'";
             SqlDataAdapter da = new SqlDataAdapter(query, clsDataSource.conn);
             DataSet ds = new DataSet();
             da.Fill(ds);

             FileStream fs = new FileStream(pathold, FileMode.Open);
             Byte[] Doc = new Byte[fs.Length];
             fs.Read(Doc, 0, (int)fs.Length);
             fs.Close();
             query = "INSERT into P2_Files (Control_No,Doc,DocTitle,DocType) Values ('" + ControlNo + "', @Doc,'" + filename + "','" + strDocExt + "') ";

             clsDataSource.OpenConnection(clsDataSource.conn);
             SqlCommand cmd = new SqlCommand(query, clsDataSource.conn);

             SqlParameter doc = new SqlParameter("@Doc", SqlDbType.VarBinary);
             doc.Value = Doc;
             cmd.Parameters.Add(doc);
             try
             {
                 cmd.ExecuteNonQuery();
                 MessageBox.Show("File Uploaded executed.");
             }
             catch (Exception ex)
             {
                 MessageBox.Show(ex.Message, "Save Image to DB");
             }
             ViewFiles();
         }

string query = "SELECT DocType From P2_Files where Control_No = '" + ControlNo.Trim() + "' and  DocTitle = '" + filename + "'";
                   SqlDataAdapter da = new SqlDataAdapter(query, clsDataSource.conn);

                   DataSet ds = new DataSet();
                   da.Fill(ds);

                   string strExtenstion = ds.Tables[0].Rows[0]["DocType"].ToString();


                   string sql = "SELECT doc FROM P2_Files WHERE Control_No = '" + ControlNo.Trim() + "' and  DocTitle = '" + filename + "'";

                   SqlCommand cmd = new SqlCommand(sql, clsDataSource.conn);
                   cmd.CommandType = CommandType.Text;


                   object doc = cmd.ExecuteScalar();



                   string tempDir = Path.GetTempPath();

                   LaunchedFile = tempDir + filename;
                   FileInfo fi = new FileInfo(LaunchedFile);
                   FileStream fs = fi.Create();
                   byte[] Data = new byte[0];
                   Data = ((byte[])doc);
                   int ArraySize = new int();
                   ArraySize = Data.GetUpperBound(0)-1;
                   fs.Write(Data, 0, ArraySize);
                   fs.Flush();
                   fs.Close();



                   Launcher = new Process();
                   Launcher.StartInfo.FileName = fi.FullName;
                   Launcher.StartInfo.WorkingDirectory = tempDir;
                   Launcher.Start();