Hi,
I think you want to open a database cursor, aren't you? Then you're search for class:
System.Data.Common.DbDataReader
or if you're searching e.g. for MS SQL Server:
System.Data.SqlClient.SqlDataReader
or OleDb:
System.Data.OleDb.OleDbDataReader
or Odbc:
System.Data.Odbc.OdbcDataReader
king regards