WFA_psychometric_chart.Form_handler.CountingDB_Item C# (CSharp) Method

        public int CountingDB_Item(string db_name)
        {
            string stmt = "SELECT COUNT(*) FROM  "+db_name+"";

            string databasePath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
            string databaseFile = databasePath + @"\db_psychrometric_project.s3db";
            string connString = @"Data Source=" + databaseFile + ";Version=3;";

            using (SQLiteConnection thisConnection = new SQLiteConnection(connString))
            {
                using (SQLiteCommand cmdCount = new SQLiteCommand(stmt, thisConnection))
                {
                    SQLiteDataReader reader = null;
                    thisConnection.Open();

                    //   countDB_Item = (int)cmdCount.ExecuteScalar();
                    reader = cmdCount.ExecuteReader();
                    while (reader.Read())
                    {
                        countDB_Item =  int.Parse(reader[0].ToString());
                       // currentLineTableFromDB = reader["line_table"].ToString();
                    }

                }
            }
            return countDB_Item;
        }