路径位置:甲骨文。Oracle 11g标准版本2的驱动程序(Oracle.DataAccess.dll)

I have installed Oracle 11g Standard Edition Release 2. I am working with nhibernate 2.2. I already spent lots of time but I could not find the location of Oracle Driver dll file (Oracle.DataAccess.dll) in the installed file.Please Help me. Thanks in advance.I have installed Oracle 11g Standard Edition Re