IT:AD:StructureMap:HowTo:Register Instances against Open Contracts

  //Notice how it's an open type:
  Type closingType = typeof(IUnitTestDbContextSeeder<>);

  ObjectFactory
    .Initialize(config => config.Scan(scanner =>
      {
        scanner.Assembly(GetType().Assembly);//this assembly only... 
        scanner.IncludeNamespaceContainingType<DefaultStudentSeeder>();//this ns only... 
        scanner
          //register types implementing open contract as singletons:
          .ConnectImplementationsToTypesClosing(closingType) //<-- NEAT!
          .OnAddedPluginTypes(expression => expression.Singleton()); //as singletons
    }
  ));