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ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = fuqiang)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )


SERVICEORCL=
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = ·þÎñÆ÷IP)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

·þÎñÆ÷tnsnames.ora
SERVICEORCL =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = ·þÎñÆ÷Ãû³Æ)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )
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C# code:
OracleConnection oracleConnection = new OracleConnection("Data Source=;User ID=system;Password=manager;Unicode=True");


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