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var types = GetType()
   .Assembly
   .GetReferencedAssemblies()
   .SelectMany(assemblyName => Assembly.Load(assemblyName).GetTypes())
   .Where(type => type.IsAssignableFrom(typeof (IDataProvider)))
   .ToList();

var types = GetType()
   .Assembly
   .GetReferencedAssemblies()
   .SelectMany(assemblyName => Assembly.Load(assemblyName).GetTypes())
   .Where(type => (typeof (IDataProvider)).IsAssignableFrom(type))
   .ToList();

Note: I have been reading [.Net solution structure of an enterprise application[(http://www.taimila.com/blog/.net-solution-structure-of-an-enterprise-application/) and it is possibly helping, but I don't have a conclusion yet.

Note: I have been reading .Net solution structure of an enterprise application and it is possibly helping, but I don't have a conclusion yet.

public sealed class DataMuncher {
   public DataMuncher(
      IEnumerable<IDataProvider> dataProviders,
      IEnumerable<IDataConsumer> dataConsumers
   ) {
      var consumersAndData = dataConsumers
         .Select(consumer => new { consumer, dataspec = GetDesiredDataSpecification })
         .Select(cas => new {
            cas.consumer,
            cas.dataspec,
            data = dataProviders
               .Select(provider => provider.RetrieveData(cas.dataspec))
         })
         .ToList();
      consumersAndData.ForEach(cas => cas.consumer.ReceiveData(cas.data));
   }
}

public sealed class DataMuncher {
   public DataMuncher(
      IEnumerable<IDataProvider> dataProviders,
      IEnumerable<IDataConsumer> dataConsumers
   ) {
      var consumersAndData = dataConsumers
         .Select(consumer => new { consumer, dataspec = consumer.GetDesiredDataSpecification() })
         .Select(cas => new {
            cas.consumer,
            cas.dataspec,
            data = dataProviders
               .Select(provider => provider.RetrieveData(cas.dataspec))
         })
         .ToList();
      consumersAndData.ForEach(cas => cas.consumer.ReceiveData(cas.data));
   }
}