Assumptions Oracle drivers are already configured. ODAC maybe a little different...
###Install EF
PM > Install-Package EntityFramework
###Add a connection to Oracle Server Explorer > Add new database connection (we'll assume TNSNAMES is configured correctly) Change the data source to Oracle (obvs)
Server: TNSNAME (the assumption is that your ConnString looks like this Data Source=tnsname_db_source;User ID=foo;Password=bar;Provider=OraOLEDB.Oracle.1;UseSessionFormat=True
UserName/Password same as connection string
###Wire up to EF
###Test code