如何使用自动生成的标识密钥更新数据集父子表？

I am using ADO.NET Datasets in my VB Applications. I have a typed dataset with one Parent table and many child tables. I want to generate Identity Key when I insert data into Parent Table and then update the data in all child tables with the Same key (As Foregin key).I am using ADO.NET Datasets in my VB Applicatio