How to set proper path to TNSNAMES file in C# application?

Question

I have a program in C# that use ODP.NET dlls:

oci.dll, ociw32.dll, Oracle.DataAccess.dll,
orannzsbb11.dll, oraocci11.dll, oraociicus11.dll,
OraOps11w.dll. 
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Answer 1

You don't need to install ODP.NET (or for that matter the Oracle Client) as you seem to have the required DLLs for a local distributable inline oracle client. In your case it's possible to have the TNSNAMES.ORA file located in the same folder as your executable and your specialised "inline oracle client" will pick it up from there. Otherwise the oracle client local to your application will try to pick it up from any client installed on the machine.