Allow customizing 'alias to bean' property not found behavior (#2287)

Author: chris-peterson

src/NHibernate/Transform/AliasToBeanResultTransformer.cs

@@ -109,6 +109,11 @@ public override IList TransformList(IList collection)
 			return collection;
 		}
 
+		protected virtual void OnPropertyNotFound(string propertyName)
+		{
+			throw new PropertyNotFoundException(_resultClass.GetType(), propertyName, "setter");
+		}
+
 		#region Setter resolution
 
 		/// <summary>
@@ -136,7 +141,7 @@ private void SetProperty(string alias, object value, object resultObj)
 			if (TrySet(alias, value, resultObj, _fieldsByNameCaseInsensitive))
 				return;
 
-			throw new PropertyNotFoundException(resultObj.GetType(), alias, "setter");
+			OnPropertyNotFound(alias);
 		}
 
 		private bool TrySet(string alias, object value, object resultObj, Dictionary<string, NamedMember<FieldInfo>> fieldsMap)