private static BillingModel GetPatBilling(string practice, int patNum)
{
var environment = PracticeManager.GetEnvironmentFromPractice(practice);
var collection = new EntityCollection <PatBillingEntity>();
var bucket = new RelationPredicateBucket();
bucket.PredicateExpression.Add(PatBillingFields.Practice == practice);
bucket.PredicateExpression.Add(PatBillingFields.BillTo == "P");
bucket.PredicateExpression.Add(PatBillingFields.PatNum == patNum);
using (var adapter = AdapterFactory.CreateAdapter(MyNameSpace, environment)) { adapter.FetchEntityCollection(collection, bucket); }
return(collection.Count < 1 ? null : new BillingModel(collection.Single()));
}