Fighting with typed data set and GetChildRows() method

Question

Hi,
I have problems with the GetChildRows method of a typed data set of a VS2005 data set designer generated code to get all child rows from a parent table. Its not working the way it should and throws a "invalid cast exception" on the line
DataSet.T_CHILDRow[] childs = parent.GetT_CHILDRows();
I don't know if the problem is me and my still limited VS/C# knowledge or the Oracle .NET provider (local installed oracle10gR2 and Oracle .NET provider v2.0.50727) or VS2005 and the code generator for the data set.
I attach the sample script to create my test table T_PARENT and T_CHILD as well as some test data and my program.cs console test application. To create the data set, just add a new data set to the solution named "DataSet.xsd" and drop the two test tables from the database explorer onto the data set designer window.
TIA,
Stefan
================ sample.sql =================
create table T_PARENT (
PARENT_ID number(10) not null,
PARENT_NAME varchar2(100) not null,
constraint T_PARENT_PK primary key(PARENT_ID)
using index
create table T_CHILD (
CHILD_ID number(10) not null,
PARENT_ID number(10) not null,
CHILD_NAME varchar2(100) not null,
constraint T_CHILD_PK primary key(CHILD_ID)
using index
alter table T_CHILD
add constraint T_CHILD_FK1 foreign key(PARENT_ID)
references T_PARENT(PARENT_ID);
insert into T_PARENT(PARENT_ID, PARENT_NAME) values (1, 'Parent 1');
insert into T_PARENT(PARENT_ID, PARENT_NAME) values (2, 'Parent 2');
insert into T_PARENT(PARENT_ID, PARENT_NAME) values (3, 'Parent 3');
insert into T_CHILD(CHILD_ID, PARENT_ID, CHILD_NAME) values (11, 1, 'First Child of Parent 1');
insert into T_CHILD(CHILD_ID, PARENT_ID, CHILD_NAME) values (12, 1, 'Second Child of Parent 1');
insert into T_CHILD(CHILD_ID, PARENT_ID, CHILD_NAME) values (13, 1, 'Third Child of Parent 1');
insert into T_CHILD(CHILD_ID, PARENT_ID, CHILD_NAME) values (31, 3, 'First Child of Parent 3');
================ program.cs =================
using System;
using System.Collections.Generic;
using System.Text;
using TestChildRows.DataSetTableAdapters;
namespace TestChildRows
     class Program
          static void Main(string[] args)
               T_PARENTTableAdapter taParent = new T_PARENTTableAdapter();
               DataSet.T_PARENTDataTable dtParents = taParent.GetData();
               foreach (DataSet.T_PARENTRow parent in dtParents)
                    Console.WriteLine("\nParent Name: " + parent.PARENT_NAME);
                    DataSet.T_CHILDRow[] childs = parent.GetT_CHILDRows();
                    if (childs.Length > 0)
                         foreach (DataSet.T_CHILDRow child in childs)
                              Console.WriteLine("\tChild Name: " + child.CHILD_NAME);
                    else
                         Console.WriteLine("\tThis parent has no childs!");
               Console.Write("\nPress any key to end program ");
               Console.ReadLine();
}

Answer 1

I found it: the problem is a bug in VS2005. Even SP1 provides no fix. MS just states that it will be fixed in the next VS release, but provides no info which release this will be.
See:
http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=114983
For a work arround see:
http://connect.microsoft.com/VisualStudio/feedback/Workaround.aspx?FeedbackID=114983
Stefan