QUESTION: Returning an ArrayList of Custom Objects From a Web Service

I have a current requirement to all a subsidiary to use a current legacy application and interface with my new system to inject data when appropriate. I wanted to create a web service since we are both .Net shops and this would seem to be the easiest method. But I ran into one snafu. I wanted to return to the subsidiary an ArrayList of my Organization objects which contain the orgs id, name etc. so they can use that information in the data insert call.

I have done a lot of looking around but have not found the answer yet to accomplish this. Here is some of the code:

1. Web service calls an object manager which returns the ArrayList:
1. ArrayList _array = ObjectManager.Instance.GetAllOrgs();
2. Object manager calls the object data store returning ArrayList
   
1. ObjectStore.Instance.GetAllOrgs();
3. Object store makes database call, passes reader to method that loops over results building an Org object and adding it to an array.:
1. public ArrayList GetAllOrgs()
   {
   ArrayList orgs = new ArrayList();
   
   using (SqlConnection connection = new SqlConnection(_connectionString))
   {
   connection.Open();
   
   SqlCommand command = new SqlCommand();
   
   command.Connection = connection;
   command.CommandType = CommandType.StoredProcedure;
   command.CommandText = "usp_GetOrgs";
   
   SqlDataReader reader = command.ExecuteReader(CommandBehavior.SingleResult);
   
   orgs = CreateOrgs(reader);
   
   }
   
   return orgs;
   }

That is my issue in a nutshell - my web page that consumes the web service does not know how to cope with the ArrayList with Org objects in it.

Any help would be much appreciated!