Hi Stoyo

With following code, allows me select container item, which is added in another container ....

ContainerNode container = new ContainerNode(this.diagram);
container.Bounds = new Rect(0, 0, 500, 500);
this.diagram.Nodes.Add(container);

ShapeNode shape1 = new ShapeNode(this.diagram);
shape1.Bounds = new Rect(0, 0, 50, 50);
shape1.Constraints.KeepInsideParent = true;
container.Children.Add(shape1);
this.diagram.Nodes.Add(shape1);

ContainerNode container2 = new ContainerNode(this.diagram);
container2.Bounds = new Rect(0, 0, 200, 200);
container2.Constraints.KeepInsideParent = true;
container.Children.Add(container2);
this.diagram.Nodes.Add(container2);

Now, if I add following new shape in "container2" doesn't allow me to select container2. It gets placed below container1. [ Container 1 and container2 gets same Z-Index i.e "0".

shape1 = new ShapeNode(this.diagram);
shape1.Bounds = new Rect(25, 25, 50, 50);
shape1.Constraints.KeepInsideParent = true;
container2.Children.Add(shape1);
this.diagram.Nodes.Add(shape1);

Will you help me in fixing this issue.