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So in a typical model where you have a parent that can have many children and a child that can have only one parent, how do you manage the adding of children. I have been using this approach; public class Parent { public Parent() { Children = new List<Child>(); } public IList<Child> Children { get; private set; } } public class Child { public Parent Parent { get; set; } } var child = new Child(); var parent = new Parent(); parent.Children.Add(child); child.Parent = parent; Problem is that everywhere i want to add a new child i've got to remember to add a reference to both the child and parent and its a bit of a pain. I could just add an AddChild method to the parent class and make that responsible for adding children - the problem now is that there is 2 ways to add a child, through the Children property and the method. So is this a better solution? public class Parent { public Parent() { children = new List<Child>(); } private IList<Child> children { get; private set; } public IEnumerable<Child> Children { get { return children; } } public void AddChild(Child child) { children.Add(child); child.Parent = this; } } Are there any guidences for best practices on this, and what do you do?

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