I am using the .NET framework with the System.Data.OracleClient namespace. I have the oracle 11 client installed on my computer. I do not want to use the tnsnames.ora file
http://www.connectionstrings.com/oracle
This is a great resource
SERVER=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=MyHost)(PORT=MyPort)) (CONNECT_DATA=(SERVICE_NAME=MyOracleSID)));uid=myUsername;pwd=myPassword;
is what you want i believe...