Entity Framework 5 en Amazon RDS - De onderliggende provider is mislukt op Open.

Het probleem zat in de verbindingsreeks. In het bijzonder had ik daar de eigenschappen "Applicatienaam" en "App". Nadat ik die had verwijderd, werkte het.

SLECHT:

<add name="MyDbEntities" connectionString="metadata=res://*/MyDb.csdl|res://*/MyDb.ssdl|res://*/MyDb.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=MyDbServer;Initial Catalog=MyDb;Persist Security Info=True;User ID=MyDb;Password=MyPassword;Application Name=MyDb.API.Models;MultipleActiveResultSets=True;App=EntityFramework&quot;" providerName="System.Data.EntityClient" />

GOED:

<add name="MyDbEntities" connectionString="metadata=res://*/MyDb.csdl|res://*/MyDb.ssdl|res://*/MyDb.msl;provider=System.Data.SqlClient;provider connection string=&quot;Data Source=MyDbServer;Initial Catalog=MyDb;Persist Security Info=True;User ID=MyDb;Password=MyPassword;MultipleActiveResultSets=True&quot;" providerName="System.Data.EntityClient" />