title: ora-12560 :TNS: protocol adapter error after installing ODP.NET
body: <p>I have installed Oracle Database 11.2.0.1 Win64 and also Client 11.2.0.1 Win64 in my windows 7 Ultimate and I was able to access Oracle database using Sql*plus 
  using <code>sqlplus / as sysdba</code>. After that I installed ODP.NET <code>ODTwithODAC1120320_32bit</code> to work with Oracle using C# in Visual Studio 2010. When i tried to add connection to Oracle database using ODP it pops out <code>ora-12560 :TNS: protocol adapter error</code> and even during logging to Oracle using <code>SqlPlus / as sysdba</code>.</p>
  
  <p>I have read several articles that say stopped service will cause but mine is running.</p>
  
  <p>What could be the problem???</p>