make master details relational in datagridview?

[Adisone]

dear master,

Today I study one topic about make master details relational in datagridview and I did coding like this below

please suggest me about it, how to do correct coding


SmartBrain_Professional.NorthwindEntities dbContext = new SmartBrain_Professional.NorthwindEntities();
dbContext.Orders.LoadAsync().ContinueWith(loadTask =>
{
//Bind data to control when loading complete
orderBindingSource.DataSource = dbContext.Orders.Include(Order => Order.Order_Details).ToArray();
}, System.Threading.Tasks.TaskScheduler.FromCurrentSynchronizationContext());






I want like this picture below





best regards



adisone

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