1    XCollection x = new XCollection();
2    x.Query.Load();
3    
4    if (x.YCollectionByPK.Count == 0) 
5        entity =   x.YCollectionByPK.AddNew(); // then the issue occurs
6    else
7        entity =   x.YCollectionByPK[0]; // not occurs the issue, works perfect
8    
9    entity.ZColectionByPK.AllowNew = true;
10   entity.ZColectionByPK.EnableHierarchicalBinding = false;
11   
12   this.bindingSource1.DataSource = entity.ZColectionByPK;
13   
14   ultraGrid1.DataSource = bindingSource1;

Code:

1    using System;
2    using System.Collections.Generic;
3    using System.ComponentModel;
4    using System.Data;
5    using System.Drawing;
6    using System.Text;
7    using System.Windows.Forms;
8    
9    using Infragistics.Win;
10   using Infragistics.Win.UltraWinGrid;
11   
12   namespace NorthwindTest
13   {
14       public partial class Form1 : Form
15       {
16           public Form1()
17           {
18               InitializeComponent();
19           }
20   
21           private void Form1_Load(object sender, EventArgs e)
22           {
23               BusinessObjects.OrdersCollection ordersColl = new BusinessObjects.OrdersCollection();
24               BusinessObjects.Orders orders = ordersColl.AddNew();
25   
26               /*
27                */
28   
29               orders.OrderDetailsCollectionByOrderID.AllowNew = true;
30               orders.OrderDetailsCollectionByOrderID.EnableHierarchicalBinding = false;
31   
32               this.bindingSource1.DataSource = orders.OrderDetailsCollectionByOrderID;
33               
34               this.ultraGrid1.DataSource = this.bindingSource1;
35               
36           }
37   
38           private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)
39           {
42               this.ultraGrid1.DisplayLayout.Override.AllowAddNew =
43                   AllowAddNew.TemplateOnBottom;
44   
47               this.ultraGrid1.DisplayLayout.Override.RowSelectors =
48                   DefaultableBoolean.True;
49           }
50       }
51   }

Code:

OrdersCollection ords = new OrdersCollection();
Orders ord = ords.AddNew();

bindingSource1.DataSource = ord.OrderDetailsCollectionByOrderID;
dataGridView1.DataSource = bindingSource1;

Code:

OrdersCollection ords = new OrdersCollection();
Orders ord = ords.AddNew();

OrderDetailsCollection od = ord.OrderDetailsCollectionByOrderID;
od.CreateColumnsForBinding();

bindingSource1.DataSource = od;
dataGridView1.DataSource = bindingSource1;