title: Cannot update Entity data model from database due to TNS error
body: <p>I'm trying to update my Entity data model from the database. Earlier today, I ran my app just fine and was able to access the database, as I have a tnsnames.ora file that I copied and pasted into my project folder. Then, when i was trying to open my edmx file, I was getting a message along the lines of:</p>
  
  <p>"The ADO.NET provider 'Oracle.ManagedDataAccess.Client' is either not registered in the machine or application config file, or could not be loaded"</p>
  
  <p>I noticed that my machine didn't have ODAC for Visual Studio installed. So I went ahead and did that. Now, I can open my edmx file just fine, but my wizard is failing to connect to the database:</p>
  
  <p>"ORA-12154: TNS:could not resolve the connect identifier specified"</p>
  
  <p>I don't think I've touched my tnsnames.ora file since this morning. What gives? </p>