user6678503 wrote:Yes. Make sure they're installed in different folders.
Can I install in the same machine Oracle Client 11.2 32bit togheter Oracle Client 11.2 64bit?
And if is possible, can I decide wich one use in my connection string?No. That's determined by the reference and the bitness of the application (32 or 64).
I must use 32 bit odp.net for entity framework, and 64 bit odp.net for direct connection... why? That doesn't make any sense. (Also, it isn't possible in the same program.)