c# - Assembly, Namespace, DAL; What classes belongs where? -

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i understand few basics assemblies , namespaces. i've reproduced nhibernate tutorial, , works fine. i'm not sure if agree on classes go where. @ solution explorer image attached..

domain , repositories (with classes in folders) namespaces. , here both in ...dal assembly.

  1. is there logical reason put there? product poco class. shouldn't more naturally belong outside dal assembly?
  2. is correct put iproductrepository in domain namespace? , if suggest move poco classes, move iproductrepository?
  3. what need if wanted make dal usable both c# , vb.net projects?

enter image description here

is there logical reason put there? product poco class. shouldn't more naturally belong outside dal assembly?

the argument putting poco class in persistence implementation simplify deployment , reduce total number of needed assemblies.

that not agree practice.

it better practice, , perhaps more conventional, place definitions of domain objects in 1 assembly, , implementations depend on persistence technology in another.

clients can reference assembly of domain object definitions without being tied implementation strategy.

is correct put iproductrepository in domain namespace? , if suggest move poco classes, move iproductrepository?

yes, correct definition of repository in domain.

repositories domain concept, not generic - @ least not interface expose (the implementations may in fact generic).

the interfaces repository should live definitions entities (whether poco's or interfaces) , other domain objects.

what need if wanted make dal usable both c# , vb.net projects?

nothing special. can reference assembly either c# or vb.net, whether dal and/or domain assemblies written in c# or vb.net. large advantage of .net whole , quite intentional , design.


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