Mono.Data.Sqlite.SqliteConnection.Schema_Tables C# (CSharp) Method

    private DataTable Schema_Tables(string strCatalog, string strTable, string strType)
    {
      DataTable tbl = new DataTable("Tables");
      DataRow row;
      string strItem;

      tbl.Locale = CultureInfo.InvariantCulture;
      tbl.Columns.Add("TABLE_CATALOG", typeof(string));
      tbl.Columns.Add("TABLE_SCHEMA", typeof(string));
      tbl.Columns.Add("TABLE_NAME", typeof(string));
      tbl.Columns.Add("TABLE_TYPE", typeof(string));
      tbl.Columns.Add("TABLE_ID", typeof(long));
      tbl.Columns.Add("TABLE_ROOTPAGE", typeof(int));
      tbl.Columns.Add("TABLE_DEFINITION", typeof(string));
      tbl.BeginLoadData();

      if (String.IsNullOrEmpty(strCatalog)) strCatalog = "main";

      string master = (String.Compare(strCatalog, "temp", true, CultureInfo.InvariantCulture) == 0) ? _tempmasterdb : _masterdb;

      using (SqliteCommand cmd = new SqliteCommand(String.Format(CultureInfo.InvariantCulture, "SELECT [type], [name], [tbl_name], [rootpage], [sql], [rowid] FROM [{0}].[{1}] WHERE [type] LIKE 'table'", strCatalog, master), this))
      using (SqliteDataReader rd = (SqliteDataReader)cmd.ExecuteReader())
      {
        while (rd.Read())
        {
          strItem = rd.GetString(0);
          if (String.Compare(rd.GetString(2), 0, "SQLITE_", 0, 7, true, CultureInfo.InvariantCulture) == 0)
            strItem = "SYSTEM_TABLE";

          if (String.Compare(strType, strItem, true, CultureInfo.InvariantCulture) == 0
            || strType == null)
          {
            if (String.Compare(rd.GetString(2), strTable, true, CultureInfo.InvariantCulture) == 0
              || strTable == null)
            {
              row = tbl.NewRow();

              row["TABLE_CATALOG"] = strCatalog;
              row["TABLE_NAME"] = rd.GetString(2);
              row["TABLE_TYPE"] = strItem;
              row["TABLE_ID"] = rd.GetInt64(5);
              row["TABLE_ROOTPAGE"] = rd.GetInt32(3);
              row["TABLE_DEFINITION"] = rd.GetString(4);

              tbl.Rows.Add(row);
            }
          }
        }
      }

      tbl.AcceptChanges();
      tbl.EndLoadData();

      return tbl;
    }