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public static DataSet Query(string SQLString)
  {
  using (OleDbConnection connection = new OleDbConnection(connectionString))
  {
  DataSet ds = new DataSet();
  try
  {
  connection.Open();
  OleDbDataAdapter command = new OleDbDataAdapter(SQLString, connection);
  command.Fill(ds, "ds");
  }
  catch (System.Data.OleDb.OleDbException ex)
  {
  // throw new Exception(ex.Message);
  }
  return ds;


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