title: ASP.NET MVC Applicatoin - Downgrading Oracle client version
body: <p>facing a problem here. We developed an asp.net mvc 4 app on a dev environment which has the oracle client v12.1 and the test environment using v 11.2 I believe. </p>
  
  <p>When we deploy the app to test we receive this error
  <img src="https://imgur.com/7v4EuYs.jpg" alt="error"></p>
  
  <p>We're unable to install the later version on the test environment, so the question is, is there as a simple way to downgrade the dev environment back to v11.2 and what main changes would I have to make on the .NET side, would there just be some assembly reference changes etc? I dont think there's any new features of ODP.NET that wouldnt be compatible with v11.2</p>
  
  <p>This is the first encounter with Oracle I've ever had, so apologies if some of this doesn't make sense. </p>