Question

The SomeRepository type is not being return by GetPublicClassesFromApplicationAssembly. I want all types of classes extending IRepository to be returned. Can anyone see the problem?

  private Type[] GetPublicClassesFromApplicationAssembly()
  {
      return typeof (SomeRepository).Assembly.GetExportedTypes()
            .Where(t => t.IsClass)
            .Where(t => t.IsAbstract == false)
            .Where(r => r.IsAssignableFrom(typeof(IRepository<>)))
            .OrderBy(t => t.Name)
            .ToArray();
  }

  public class SomeRepository : IRepository<SomeDomainClass> {}

  public interface IRepository<T> where T : PrimaryKeyBase {}

  public class SomeDomainClass: PrimaryKeyBase {}

Answer 1

SomeRepository is not assignable from IRepository<>, which is not a “real” type; it’s assignable from IRepository<SomeDomainClass>. You need to use GetInterface instead of IsAssignableFrom:

        .Where(r => r.GetInterface("IRepository`1") != null